On a two-unit cold standby system considering hardware, human error failures and preventive maintenance. - Mohamed A. W. Mahmoud; M. E. Moshref (Math. Comput. Model., 2010)

New classes at Specific Age: Properties and Testing hypotheses. - Mohamed A. W. Mahmoud; M. E. Moshref; A. M. Gadallah; A. I. Shawky (J. Stat. Theory Appl., 2013)