Granular computing biapproximation spaces. - A. M. Kozae; H. M. Abu-Donia (GrC, 2005)

Comparison between different kinds of approximations by using a family of binary relations. - H. M. Abu-Donia (Knowl. Based Syst., 2008)

Generalization of Pawlak's rough approximation spaces by using δβ-open sets. - H. M. Abu-Donia; A. S. Salama (Int. J. Approx. Reason., 2012)

Multi knowledge based rough approximations and applications. - H. M. Abu-Donia (Knowl. Based Syst., 2012)