AGRATINI O. Book reviews: “Vijay Gupta, Michael Th. Rassias,” Moments of Linear Positive Operators and Approximation, Springer, 2019, viii + 96 p., ISBN 978-3-030-19454-3; 978-3-030-19455-0 (ebook). Stud. Univ. Babeş-Bolyai Math. [Internet]. 2019 Dec. 30 [cited 2025 Feb. 5];64(4):601. Available from: https://studia.reviste.ubbcluj.ro/index.php/subbmathematica/article/view/2384