VOISEI MD. The sum theorem for maximal monotone operators in reflexive Banach spaces revisited. Stud. Univ. Babeş-Bolyai Math. [Internet]. 2021 Mar. 30 [cited 2025 Feb. 5];66(1):123-6. Available from: https://studia.reviste.ubbcluj.ro/index.php/subbmathematica/article/view/1267