alia, I., I. Merzouk, and M. Mounir Rezaoui. “Sub-Module Voltage Estimation of Modular Multilevel Converter in PV Applications Using a Sliding Mode Observer”. ITEGAM-JETIA, Vol. 11, no. 52, Mar. 2025, pp. 92-02, doi:10.5935/jetia.v11i52.1539.