R. Usbeck, A. Ngomo, M. Röder, D. Gerber, S. Coelho, S. Auer, and A. Both. ECAI 2014 - 21st European Conference on Artificial Intelligence,
18-22 August 2014, Prague, Czech Republic - Including Prestigious
Applications of Intelligent Systems (PAIS 2014), volume 263 of Frontiers in Artificial Intelligence and Applications, page 1113--1114. IOS Press, (2014)