LICHAWSKI, Kazimierz. Boundary values of the solutions of the parabolic equation. Annales Mathematicae Silesianae, [S. l.], v. 1, p. 66–88, 1985. Disponível em: https://journals.us.edu.pl/index.php/AMSIL/article/view/14337. Acesso em: 5 dec. 2025.