Nedelcheva, Diana Kirilova. „SOME FIXED POINT RESULTS FOR α-ψ- CONTRACTION SET - VALUED MAPPINGS IN CONE METRIC SPACES“. Balkan Journal of Applied Mathematics and Informatics 1, no. 1 (August 7, 2018): 39-48. Zugegriffen Juli 22, 2024. https://js.ugd.edu.mk/index.php/bjami/article/view/2010.