MITROPOLSKIY, Yu. A.; NIKITIN, A. G.; PARASYUK, O. S.; SAMOILENKO, A. M. Wilhelm Illich Fushchych (on his 60th birthday). Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 48, n. 12, p. 1587–1588, 1996. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/5181. Acesso em: 6 dec. 2025.