. (2004). . (e123998). Strategy, 11(4), e123998
. "" .e123998 , Strategy, 11, 4, 2004, e123998.
. (2004). '', Strategy, 11(4), e123998.
, "," Strategy, 11 4 (2004): e123998,
. . Strategy. 2004;11(4):e123998 (In Persian).
