Al-Muttalibi, Rana, and Radhi M.A Ali. “Certain Types of Linear Operators on Probabilistic Hilbert Space”. Global Journal of Mathematical Analysis 3, no. 2 (May 24, 2015): 81–88. Accessed December 5, 2025. https://www.sciencepubco.com/index.php/GJMA/article/view/4664.