. (2001). . (e123803). Strategy, 9(3), e123803
. "" .e123803 , Strategy, 9, 3, 2001, e123803.
. (2001). '', Strategy, 9(3), e123803.
, "," Strategy, 9 3 (2001): e123803,
. . Strategy. 2001;9(3):e123803 (In Persian).
