2[1]See John W. Atkinson," Motivational Determinants of Risk taking Behavior" [ J ], Psychological review, vol. 64, No. 6,1957, p.365.
3[2]David E. Berblew and Douglas T. Hall, "Some Determinants of Early Managerial Success," [ M ], Alfred P. Sloan School of Management Organization Research Program # 81 -64,p. 13.