“Existence of positive solutions for the singular equation $(\varphi_p(y^\prime))^\prime+g(t,y,y^\prime)=0$” (2003) Neliniini Kolyvannya, 6(1), pp. 117–132. Available at: https://twinhead.imath.kiev.ua/index.php/nosc/article/view/253 (Accessed: 22 January 2026).