Existence of positive solutions for the singular equation $(\varphi_p(y^\prime))^\prime+g(t,y,y^\prime)=0$. Neliniini Kolyvannya, [S. l.], v. 6, n. 1, p. 117–132, 2003. Disponível em: https://twinhead.imath.kiev.ua/index.php/nosc/article/view/253. Acesso em: 22 jan. 2026.