1.
Todorov P. A simple proof of a coincidence theorem of Rubinstein-Walsh and generalizations. Ann. Sofia Univ. Fac. Math. and Inf. [Internet]. 1997 Dec. 12 [cited 2024 Nov. 24];89:113-6. Available from: https://ftl5.uni-sofia.bg./index.php/fmi/article/view/360