. (2002). . (e123807). Strategy, 9(4), e123807
. "" .e123807 , Strategy, 9, 4, 2002, e123807.
. (2002). '', Strategy, 9(4), e123807.
, "," Strategy, 9 4 (2002): e123807,
. . Strategy. 2002;9(4):e123807 (In Persian).
