. (2001). . (e123779). Strategy, 9(2), e123779
. "" .e123779 , Strategy, 9, 2, 2001, e123779.
. (2001). '', Strategy, 9(2), e123779.
, "," Strategy, 9 2 (2001): e123779,
. . Strategy. 2001;9(2):e123779 (In Persian).
