Existence and uniqueness for a fractional differential equation involving Atangana-Baleanu derivative by using a new contraction. Lett. Nonlinear Anal. Appl. [Internet]. 2023 Jan. 10 [cited 2026 Jun. 10];1(2):52-6. Available from: https://lettersinnonlinearanalysis.com/index.php/lnaa/article/view/v1n2a06