BARBU, V. Ioan I. Vrabie - In Memoriam. Topological Methods in Nonlinear Analysis, [S. l.], v. 54, n. 2B, p. 869–870, 2020. Disponível em: https://apcz.umk.pl/TMNA/article/view/TMNA.2019.102. Acesso em: 22 jul. 2024.