. (2001). . (e123781). Strategy, 9(2), e123781
. "" .e123781 , Strategy, 9, 2, 2001, e123781.
. (2001). '', Strategy, 9(2), e123781.
, "," Strategy, 9 2 (2001): e123781,
. . Strategy. 2001;9(2):e123781 (In Persian).
