Dragomir, Silvestru Sever. “Gradient Inequalities for an Integral Transform of Positive Operators in Hilbert Spaces”. Annales Mathematicae Silesianae 37, no. 2 (July 26, 2023): 248–265. Accessed May 7, 2025. https://trrest.vot.pl/ojsus/index.php/AMSIL/article/view/15788.