Bezoui, MadaniMoulai, MustaphaBounceur, Ahcène2018-02-072018-02-072016https://dspace.univ-boumerdes.dz/handle/123456789/4453enCardinality portfolio selectionBi-objective programmingMixed integer programmingExact methodSteepest MethodNumber of Securities in the PortfolioAn empirical study to find the optimal number of security in portfolio selection problemOther