. (2003). . (e123930). Strategy, 11(2), e123930
. "" .e123930 , Strategy, 11, 2, 2003, e123930.
. (2003). '', Strategy, 11(2), e123930.
, "," Strategy, 11 2 (2003): e123930,
. . Strategy. 2003;11(2):e123930 (In Persian).
