LITOVCHENKO, V. A. One method for the investigation of the fundamental solution of the Cauchy problem for parabolic systems. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 70, n. 6, p. 801–811, 2018. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/1596. Acesso em: 14 apr. 2025.