6Letcher L. and Niehoff B, "Psychological capital and wages: A behavioral economic approach", Paper submitted to be considered for presentation at the Midwest Academy of Management, Minneapolis, MN, 2004.
7Cole K. Wellbeing, "psychological capital, and unemployment: An integrated theory", Paper presented at the joint annual conference of the International Association for Research in Economic Psychology (IAREP) and the Society for the Advancement of Behavioral Economics (SABE), Paris, France, 2006.
8Avolio B. J. and Gardner, W. L (eds.), "Unlocking the mask: A look at the process by which authentic leaders impact follower attitudes and behaviors" , Leadership Quarterly, vol. 15, no. 6 (2004), pp. 801 - 823.
9Avolio B. and Luthans F, The high impact leader: Moments matter in accelerating authentic leadership development, New York: McGraw - Hill, 2006.
