. (2004). . (e123990). Strategy, 11(4), e123990
. "" .e123990 , Strategy, 11, 4, 2004, e123990.
. (2004). '', Strategy, 11(4), e123990.
, "," Strategy, 11 4 (2004): e123990,
. . Strategy. 2004;11(4):e123990 (In Persian).
