. (2003). . (e123937). Strategy, 11(2), e123937
. "" .e123937 , Strategy, 11, 2, 2003, e123937.
. (2003). '', Strategy, 11(2), e123937.
, "," Strategy, 11 2 (2003): e123937,
. . Strategy. 2003;11(2):e123937 (In Persian).
