The existence of solutions for some new boundary value problems involving the q-derivative operator in quasi-b-metric and b-metric-like spaces. Lett. Nonlinear Anal. Appl. [Internet]. 2024 Feb. 22 [cited 2026 May 24];2(1):16-22. Available from: https://lettersinnonlinearanalysis.com/index.php/lnaa/article/view/v2n1a03