. (2003). . (e123939). Strategy, 11(2), e123939
. "" .e123939 , Strategy, 11, 2, 2003, e123939.
. (2003). '', Strategy, 11(2), e123939.
, "," Strategy, 11 2 (2003): e123939,
. . Strategy. 2003;11(2):e123939 (In Persian).
