Chervenov N, Georgiev V, Vassilev A. In Memoriam Iordan Iordanov (1948-2021). Ann. Sofia Univ. Fac. Math. and Inf. [Internet]. 2024 Dec. 4 [cited 2024 Dec. 23];111:5-24. Available from: https://stipendii.uni-sofia.bg/index.php/fmi/article/view/995