Towards an Oil Crisis Early Warning System based on Absolute News Volume. - Felix Wex; Natascha Widder; Markus Hedwig; Michael Liebmann; Dirk Neumann 001 (ICIS, 2012)

Early Warning of Impending Oil Crises Using the Predictive Power of Online News Stories. - Felix Wex; Natascha Widder; Michael Liebmann; Dirk Neumann 001 (HICSS, 2013)