Differential Equations & Applications · Volume 14, Issue 1 Three weak solutions for a degenerate nonlocal singular sub-linear problem 14-04 Pages 49-63 DOI 10.7153/dea-2022-14-04 Downloads Short PDF Full PDF PNG Authors Shapour Heidarkhani Kit Ian Kou Amjad Salari Keywords European option pricing nonlocal singular three solutions critical point theory Subject classes 35J92 35J75 34B10 58E05