HEITTOKANGAS, J.; PULKKINEN, S.; YU, H.; ZEMIRNI, M. A. Standard solutions of complex linear differential equations. Annales Fennici Mathematici, [S. l.], v. 49, n. 2, p. 663–683, 2024. DOI: 10.54330/afm.152368. Disponível em: https://afm.journal.fi/article/view/152368. Acesso em: 22 dec. 2024.