PIĘTKA, Marek. Uniqueness of the solution of the Cauchy problem for the partial differential equations and the convolution equations. Annales Mathematicae Silesianae, [S. l.], v. 5, p. 57–67, 1991. Disponível em: https://journals.us.edu.pl/index.php/AMSIL/article/view/14282. Acesso em: 18 apr. 2025.