WÓJTOWICZ, K. Mathematical Proof – Argumentation or Derivation? – Part II. Philosophical Problems in Science (Zagadnienia Filozoficzne w Nauce), [S. l.], n. 49, p. 81–97, 2011. Disponível em: https://zfn.edu.pl/index.php/zfn/article/view/121. Acesso em: 29 jan. 2023.