1.Baruch Fischhoff, Stephen R. Watson, Chris Hope, (1984). “Defining Risk,” Policy Sciences October 1984, Volume 17, Issue 2, pp 123-139. From http://link.springer.com/article/10.1007/BF00146924
2.Dequech, D. (2003). “Uncertainty and Economic Sociology.” American Journal of Economics & Sociology, Vol. 62, pp.509-532. From http://www.jstor.org/stable/3487809