. (2002). . (e123805). Strategy, 9(4), e123805
. "" .e123805 , Strategy, 9, 4, 2002, e123805.
. (2002). '', Strategy, 9(4), e123805.
, "," Strategy, 9 4 (2002): e123805,
. . Strategy. 2002;9(4):e123805 (In Persian).
