1.
RUS IA. Some variants of contraction principle, generalizations and applications: Dedicated to Professor Gheorghe Coman on the occasion of his 80th anniversary. Stud. Univ. Babeş-Bolyai Math. [Internet]. 2016 Sep. 30 [cited 2025 May 9];61(3):343-58. Available from: https://studia.reviste.ubbcluj.ro/index.php/subbmathematica/article/view/5585