Lenуuk M. P.; Shestоpal A. F. In bifurcated solution of the Cauchy problem for one class of parabolic systems . Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 23, n. 1, p. 110–117, 1970. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/8491. Acesso em: 6 dec. 2025.