A. Brew, D. Greene, и P. Cunningham. Proceedings of the 19th European Conference on Artificial Intelligence, том 215 из Frontiers in Artificial Intelligence and Applications, стр. 145--150. Amsterdam, The Netherlands, The Netherlands, IOS Press, (2010)
A. Zehe, M. Becker, F. Jannidis, и A. Hotho. KI 2017: Advances in Artificial Intelligence, стр. 387--394. Cham, Springer International Publishing, (2017)