GONSKA H, HEILMANN M, RAȘA I. Eigenstructure of the genuine Beta operators of Lupaș and Mühlbach: Dedicated to Professor Gheorghe Coman on the occasion of his 80th anniversary. Stud. Univ. Babeş-Bolyai Math. [Internet]. 2016 Sep. 30 [cited 2025 Feb. 5];61(3):383-8. Available from: https://studia.reviste.ubbcluj.ro/index.php/subbmathematica/article/view/5604