Updating and asymptotic relative efficiency of a non-linear discriminant function estimated from a mixture of two Gompertz populations. - H. M. Moustafa; S. G. Ramadan (Appl. Math. Comput., 2004)

Errors of misclassification and their probability distributions when the parent populations are Gompertz. - H. M. Moustafa; S. G. Ramadan (Appl. Math. Comput., 2005)

Nonlinear Discriminant Functions for Mixed Random Walk Models. - H. M. Moustafa; S. G. Ramadan; S. A. Mohammed (Commun. Stat. Simul. Comput., 2010)