On a nonlinear delay population model. - István Györi; Ferenc Hartung; Nahed Abdelfattah Mohamady (Appl. Math. Comput., 2015)

Existence and uniqueness of positive solutions of a system of nonlinear algebraic equations. - István Györi; Ferenc Hartung; Nahed Abdelfattah Mohamady (Period. Math. Hung., 2017)

Persistence and permanence of delay differential equations in biomathematics - Nahed Abdelfattah Mohamady (2017)