RADOVIČIUS, Jurijus. Logical Negation and Biological Death. Problemos, [S. l.], v. 55, p. 110–117, 1999. DOI: 10.15388/Problemos.1999.55.6878. Disponível em: https://test.zurnalai.vu.lt/problemos/article/view/6878. Acesso em: 23 oct. 2025.