. (2003). . (e123928). Strategy, 11(2), e123928
. "" .e123928 , Strategy, 11, 2, 2003, e123928.
. (2003). '', Strategy, 11(2), e123928.
, "," Strategy, 11 2 (2003): e123928,
. . Strategy. 2003;11(2):e123928 (In Persian).
