. (2004). . (e123991). Strategy, 11(4), e123991
. "" .e123991 , Strategy, 11, 4, 2004, e123991.
. (2004). '', Strategy, 11(4), e123991.
, "," Strategy, 11 4 (2004): e123991,
. . Strategy. 2004;11(4):e123991 (In Persian).
