Aali, Nawal Ait, Amine Baina, and Loubna Echabbi. 2019. “Trust Management Approach for Securing the Services Access:Telecom Operators Collaborations in IMS Network”. Journal of Mobile Multimedia 15 (1-2):51-70. https://journals.riverpublishers.com/index.php/JMM/article/view/4421.