RYABCHENKO, V. Biological, Ecological, Social Systems and Problem of Man’s Choise: Social and Philosophical Aspect. Filosofiya osvity. Philosophy of Education, [S. l.], v. 4, n. 2, 2006. Disponível em: https://philosopheducation.com/index.php/philed/article/view/183. Acesso em: 4 mar. 2024.