Kisiel R, Kowalewska A, Kowalewska J. The Impact of Implemented Innovations on Competitiveness of Tourism Companies in the Warmińsko-Mazurskie Voivodeship. aspe [Internet]. 2020 Dec. 30 [cited 2024 May 4];19(4):87-94. Available from: https://aspe.sggw.edu.pl/article/view/80