. (2003). . (e123929). Strategy, 11(2), e123929
. "" .e123929 , Strategy, 11, 2, 2003, e123929.
. (2003). '', Strategy, 11(2), e123929.
, "," Strategy, 11 2 (2003): e123929,
. . Strategy. 2003;11(2):e123929 (In Persian).
