by Bakkari, Chahrazade, Es-Saidi, Mohamed, Mahdou, Najib, Moutui, Moutu Abdou Salam
Published in Czechoslovak mathematical journal (01.07.2022)

by Dong, Jinlei, Li, Fang, Sun, Longgang
Published in AIMS mathematics (01.01.2023)

by Alabiad, Sami, Alkhamees, Yousef
Published in AIMS mathematics (01.01.2022)

by Bakkari, C., Kabbaj, S., Mahdou, N.
Published in Journal of pure and applied algebra (2010)

by Caramello, Olivia, Lafforgue, Laurent
Published in Journal of geometry and physics (01.08.2019)

by Abuhlail, J., Jarrar, M., Kabbaj, S.
Published in Journal of pure and applied algebra (01.10.2011)