KALENDA, Česlovas. What is Science?. Problemos, [S. l.], v. 17, p. 110–111, 1976. DOI: 10.15388/Problemos.1976.17.5617. Disponível em: https://www.zurnalai.vu.lt/problemos/article/view/5617. Acesso em: 7 nov. 2025.