. (2003). . (e123940). Strategy, 11(2), e123940
. "" .e123940 , Strategy, 11, 2, 2003, e123940.
. (2003). '', Strategy, 11(2), e123940.
, "," Strategy, 11 2 (2003): e123940,
. . Strategy. 2003;11(2):e123940 (In Persian).
