Bell, E., Norwood, B.F., Lusk, J.L. (2017). Are consumers wilfully ignorant about animal welfare? Animal Welfare, 26 (4), 399-402. https://doi.org/10.7120/09627286.26.4.399 (Crossref)

Bennett, R., Larson, D. (1996). Contingent valuation of the perceived benefits of farm animal welfare legislation: an exploratory survey. Journal of Agricultural Economics, 47 (1-4), 224-235. https://doi:10.1111/j.1477-9552.1996.tb00686.x (Crossref)

Blandford, D., Bureau J.C., Fulponi, L., Henson, S. (2002). Potential Implications of Animal Welfare Concerns and Public Policies in Industrialized Countries for International Trade. Global Food Trade and Consumer Demand for Quality, 2, 77-99. (Crossref)

Bougherara, D., Combris, P. (2009). Eco-labelled food products: what are consumers paying for? European Review of Agricultural Economics, 36 (3), 321-341. (Crossref)

Brambell, F.W.R. (1965). Report of the technical committee to Enquire into the welfare of animals kept under intensive livestock husbandry systems. Her Majesty's Stationery Office; Reprinted 1967. Retrieved from: www. edepot.wur.nl/134379 [accessed: 20.02.2018].

Broom, D.M. (1986). Indicators of poor welfare. British Veterinary Journal, 142 (6), 524-526. (Crossref)

Brown, K.H., Hollingsworth, J. (2005). The food marketing institute and the national council of chain restaurants: Animal welfare and the retail industry in the United States of America, food retail industry and programme. Revue Scientifique et technique - Office International Des Epizooties, 24 (2), 655-681. (Crossref)

Budzyńska, M. (2015). Współczesne zagadnienia w badaniach i nauczaniu dobrostanu zwierząt [Current issues in animal welfare research and education]. Wiadomości Zootechniczne, 53, 58-64.

Cornish, A., Raubenheimer, D., McGreevy, P. (2016). What We Know about the Public's Level of Concern for Farm Animal Welfare in Food Production in Developed Countries. Animals (Basel). Animals, 6 (11), 74. https://doi:10.3390/ani6110074 (Crossref)

Dawkins, M.S. (2008). The Science of Animal Suffering. https://doi: 10.1111/j.1439-0310.2008.01557.x. Retrieved from: users.ox.ac.uk/abrg/papers/dawkins/eth1557.pdf [accessed: 20.02.2018]. (Crossref)

Erian, I., Phillips, C.J.C. (2017). Public Understanding and Attitudes towards Meat Chicken Production and Relations to Consumption. Animals (Basel). MDPI Animal. https://doi:10.3390/ani7030020 (Crossref)

European Commission (2012). Communication from the commission to the European Parliament, the council and the European Economic and social committee on the European Union Strategy for the Protection and Welfare of Animals 2012-2015. COM(2012)06 final. Brussels.

European Commission (2016). Special Eurobarometer 442. Report. Attitudes of Europeans towards Animal Welfare. European Commision. https://doi 10.2875/884639

European Parliament (2017). Animal Welfare in the European Union. Study for the Peti Committee. Policy Department, Citizens' Rights and Constitutional Affairs, Strasbourg. Retrieved from: www.europarl.europa. eu/RegData/etudes/STUD/2017/583114/IPOLSTU( 2017)583114_EN.pdf [accessed: 20.01.2018].

FAO (2009). The State of Food and Agriculture. Livestock in the balance. Food and Agriculture Organization of the United Nations. Rome. Retrieved from: http://www.fao.org/docrep/012/i0680e/i0680e.pdf [accessed: 10.03.2018].

Gębska, M., Gołębiewska, B. (2016). The influence of enhancing broilers welfare on the environment. Sustainability of rural areas in practice. [In:] Conference proceedings from international scientific conference: Slovak University of Agriculture in Nitra, Slovakia, 399-407.

Gębska, M., Malak-Rawlikowska, A., Majewski, E., Rekiel, A. (2013). Ekonomiczne aspekty podnoszenia dobrostanu w tuczu trzody chlewnej [Economic aspects of enhancing animal welfare standards in fatteners' production]. Przegląd Hodowlany, 6, 5-7.

Grandin, T. (2012). Auditing animal welfare and making practical improvements in beef-, pork- and sheepslaughter plants. Animal Welfare, 21 (S2), 29-34. https://doi.org/10.7120/096272812X13353700593400 (Crossref)

Hansson, H., Lagerkvist, C.J. (2014). Defining and measuring farmers' attitudes to farm animal welfare. Animal Welfare, 23 (1), 47-56. https://doi.org/10.7120/09627286.23.1.047 (Crossref)

Hughes, B.O., Duncan, I.H.J. (1988). Behavioural needs: can they be explained in terms of motivational models? Applied Animal Behaviour Science, 20, 352-355. (Crossref)

Kjorstad, I. (2006). Norwegian country report Public opinion survey on farm animal welfare and consumption. The National Institute for Consumer Research SIFO, Norway.

Kokocińska, A., Kaleta, T. (2016). Znaczenie etologii w naukach o dobrostanie zwierząt [The role of ethology in animal welfare]. Roczniki Naukowe Polskiego Towarzystwa Zootechnicznego, 12 (1), 49-62. (Crossref)

Krupiński, J., Horbańczuk, J., Kołacz, R., Litwińczuk, Z., Niemiec, J., Zięcik A. (2011). Strategiczne kierunki rozwoju produkcji zwierzęcej uwarunkowane oczekiwaniem społecznym, ochrona środowiska i dobrostanem zwierząt [Strategic directions for development of animal production as determined by social expectations, environmental protection and animal welfare]. Polish Journal of Agronomy, 7, 59-67.

Lawrence, A.B., Newberry, R.C., Spinka, M. (2018). Positive welfare: What does it add to the debate over pig welfare? [In:] Advances in pig welfare, 415-444. https://doi.org/10.1016/B978-0-08-101012-9.00014-9 (Crossref)

Malak-Rawlikowska, A., Gębska, M., Spaltabaka, E. (2010). Społeczne i prawne aspekty dobrostanu bydła mlecznego w wybranych krajach europejskich i w Polsce [Social and legal aspects of upgrading dairy welfare norms in selected European countries and in Poland]. Roczniki Naukowe Rolnictwa Seria G, 97 (1), 28-42.

Manteca, X., Mainau, E., Temple, D. (2012). What is animal welfare? The Farm Animal Welfare Fact Sheet, 1. Retrieved from: https://www.fawec.org/media/com_lazypdf/pdf/fs1-en.pdf [accessed: 12.02.2018].

Mejdell CM. The role of councils on animal ethics in assessing acceptable welfare standards in agriculture. Livestock Science, 103, 292-296. (Crossref)

Mroczek, J.R. (2013). Dobrostan zwierząt jako element retardacji przekształcania zasobów w produkcji zwierzęcej [Animal welfare as an element of retardation reversing the transformation of resources in livestock production]. Inżynieria Ekologiczna, 34, 181-188. (Crossref)

Ozimek, I., Żakowska-Biemas, S. (2011). Determinants of Polish consumers' food choices and their implication for the national food industry. British Food Journal, 113 (1), 138-154. https://doi10.1108/00070701111097394 (Crossref)

Schnettler, B.M., Vidal R.M., Silva, R.F., Vallejos, L.C., Sepulveda, N.B. (2008). Consumer Perception of Animal Welfare and Livestock Production in the Araucania Region, Chile. Chilean Journal of Agricultural Research, 68 (1), 80-93. https://doi.org/10.4067/S0718-58392008000100008 (Crossref)

Spooner, J.M., Schuppli. C.A., Fraser, D. (2014). Attitudes of Canadian citizens toward farm animal welfare: A qualitative study. Livestock Science, 163, 150-158. (Crossref)

Van de Weerd, H., Sandilands, V. (2008). Bringing the issue of animal welfare to the public: A biography of Ruth Harrison (1920-2000). Applied Animal Behaviour Science, 113, 404-410. (Crossref)

Ventura, B.A., von Keyserlingk, M.A.G., Wittman, H., Weary, D.M. (2016). What Difference Does a Visit Make? Changes in Animal Welfare Perceptions after Interested Citizens Tour a Dairy Farm. PLOS ONE, 11 (5), e0154733. https://doi.org/10.1371/journal.pone.0154733 (Crossref)

You, X., Li, Y., Zhang, M., Yan, H., Zhao, R. (2014). A Survey of Chinese Citizens' Perceptions on Farm Animal Welfare. PLOS ONE, 9 (10), e109177. https://doi.org/10.1371/journal.pone.0109177 (Crossref)