Stepaniuk, K. “SELECTED CONCEPTS OF DESIGN, IMPLEMENTATION AND DEVELOPMENT OF E-AGRITOURIST ACTIVITY IN PODLASKIE VOIVODESHIP”. Acta Scientiarum Polonorum. Oeconomia, vol. 9, no. 4, Dec. 2010, pp. 509-17, https://aspe.sggw.edu.pl/article/view/625.