. (2001). . (e123802). Strategy, 9(3), e123802
. "" .e123802 , Strategy, 9, 3, 2001, e123802.
. (2001). '', Strategy, 9(3), e123802.
, "," Strategy, 9 3 (2001): e123802,
. . Strategy. 2001;9(3):e123802 (In Persian).
