Letkiewicz S. A Criterion for Determining Legal and Ethical Boundaries in Medical Research With Regard to Realizing the Constitu-tional Principle of Sustainable Development. PROBL EKOROZW [Internet]. 2009 Jul. 1 [cited 2024 Jul. 22];4(2):49-60. Available from: https://ph.pollub.pl/index.php/preko/article/view/4690