Chlastawa, Daniel. “Is Conceptualism a Sufficient Reason for the Rejection of Non-Constructive Existence Proofs in Mathematics?”. Philosophical Problems in Science (Zagadnienia Filozoficzne w Nauce), no. 51 (November 27, 2012): 116–130. Accessed May 18, 2024. https://www.zfn.edu.pl/index.php/zfn/article/view/89.