On global stability of a nonautonomous quasilinear system in a certian critical case. Neliniini Kolyvannya, [S. l.], v. 3, n. 3, p. 323–333, 2000. Disponível em: https://twinhead.imath.kiev.ua/index.php/nosc/article/view/124. Acesso em: 22 jan. 2026.