In this paper, we study a $(p,q)$-Laplace equation with singular and critical terms and establish the existence of multiple positive solutions via use of variational methods.
"Multiple positive solutions for a $(p,q)$-Laplace equation involving singular and critical terms." Rocky Mountain J. Math. 49 (4) 1169 - 1189, 2019. https://doi.org/10.1216/RMJ-2019-49-4-1169