LIBARDI, A. K. M. Remembering Volodymyr Vasilyovich Sharko. Topological Methods in Nonlinear Analysis, [S. l.], v. 46, n. 2, p. 695–696, 2015. Disponível em: https://apcz.umk.pl/TMNA/article/view/8315. Acesso em: 20 jan. 2022.