KOROBEINIK, J. F. On the Cauchy’s Problem for the differential equation of infinite Order. Lithuanian Mathematical Journal, [S. l.], v. 5, n. 3, p. 397–420, 1965. DOI: 10.15388/LMJ.1965.19595. Disponível em: https://www.journals.vu.lt/LMJ/article/view/19595.. Acesso em: 7 may. 2024.