. (2001). . (e123777). Strategy, 9(2), e123777
. "" .e123777 , Strategy, 9, 2, 2001, e123777.
. (2001). '', Strategy, 9(2), e123777.
, "," Strategy, 9 2 (2001): e123777,
. . Strategy. 2001;9(2):e123777 (In Persian).
