PORTENKO, N. I. A Probabilistic Representation for the Solution of One Problem of Mathematical Physics. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 52, n. 9, p. 1272–1282, 2000. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/4534. Acesso em: 5 dec. 2025.