Improved krill herd algorithm based sliding mode MPPT controller for variable step size P&O method in PV system under simultaneous change of irradiance and temperature. - Van-Quang-Binh Ngo; Mohsen Latifi; Rabeh Abbassi; Houssem Jerbi; Kentaro Ohshima; Mehrdad Khaksar (J. Frankl. Inst., 2021)