GUNDERSEN, G. G.; STEINBART, E. M. Finite order solutions of nonhomogeneous linear differential equations. Annales Fennici Mathematici, [S. l.], v. 17, n. 2, p. 327–341, 1992. DOI: 10.5186/aasfm.1992.1722. Disponível em: https://afm.journal.fi/article/view/134761. Acesso em: 25 nov. 2024.