LITOVCHENKO, V. A.; UNGURYAN, G.M. Fundamental solution of the Cauchy problem for the Shilov-type parabolic systems with coefficients of bounded smoothness. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 69, n. 3, p. 348–364, 2017. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/1701. Acesso em: 5 dec. 2025.