. (2004). . (e123981). Strategy, 11(4), e123981
. "" .e123981 , Strategy, 11, 4, 2004, e123981.
. (2004). '', Strategy, 11(4), e123981.
, "," Strategy, 11 4 (2004): e123981,
. . Strategy. 2004;11(4):e123981 (In Persian).
