Letkiewicz, S. (2009) “A Criterion for Determining Legal and Ethical Boundaries in Medical Research With Regard to Realizing the Constitu-tional Principle of Sustainable Development”, Problemy Ekorozwoju, 4(2), pp. 49–60. Available at: https://ph.pollub.pl/index.php/preko/article/view/4690 (Accessed: 22 July 2024).