. (2003). . (e123921). Strategy, 11(1), e123921
. "" .e123921 , Strategy, 11, 1, 2003, e123921.
. (2003). '', Strategy, 11(1), e123921.
, "," Strategy, 11 1 (2003): e123921,
. . Strategy. 2003;11(1):e123921 (In Persian).
