Messirdi, Sofiane, Sanaa Messirdi, B. Sadli, and B. Messirdi. 2021. “A New Representation of Left and Right Generalized Drazin Invertible Operators”. Methods of Functional Analysis and Topology 27 (1): 37-43. https://doi.org/https://doi.org/10.31392/MFAT-npu26_1.2021.06.