KLEIZA, J. On solving the system of linear partial differential equations in Dirichlet series. Lithuanian Mathematical Journal, [S. l.], v. 12, n. 4, p. 87–97, 1972. DOI: 10.15388/LMJ.1972.21155. Disponível em: https://www.journals.vu.lt/LMJ/article/view/21155.. Acesso em: 17 aug. 2024.