AIT-MAHIOUT, K.; DJEBALI, S.; MOUSSAOUI, T. Multiple solutions for an impulsive boundary value problems on the halfline via Morse theory. Topological Methods in Nonlinear Analysis, [S. l.], v. 47, n. 1, p. 219–240, 2016. DOI: 10.12775/TMNA.2016.003. Disponível em: https://apcz.umk.pl/TMNA/article/view/TMNA.2016.003. Acesso em: 23 apr. 2024.