. (2001). . (e123780). Strategy, 9(2), e123780
. "" .e123780 , Strategy, 9, 2, 2001, e123780.
. (2001). '', Strategy, 9(2), e123780.
, "," Strategy, 9 2 (2001): e123780,
. . Strategy. 2001;9(2):e123780 (In Persian).
