Pawłowa , Jelena. “System Approach in the Works of K. E. Ciołkowski”. Studia Ecologiae et Bioethicae 2, no. 1 (December 31, 2004): 773–782. Accessed November 3, 2024. https://czasopisma.uksw.edu.pl/index.php/seb/article/view/6872.