CZEKALSKI, Stefan; ŻOŁĄDEK, Henryk. First order linear differential equations with involutive delay and hypergeometric functions. Topological Methods in Nonlinear Analysis, [S. l.], v. 52, n. 1, p. 11–29, 2017. Disponível em: https://apcz.umk.pl/TMNA/article/view/TMNA.2017.002. Acesso em: 9 mar. 2025.