M. Valenzuela, V. Ha, und O. Etzioni. Scholarly Big Data: AI Perspectives, Challenges, and Ideas, Papers from the 2015 AAAI Workshop, WS-15-13, Seite 21--26. Menlo Park, CA, AAAI Press, (2015)
U. Callmeier, A. Eisele, U. Schäfer, und M. Siegel. Proceedings of the 4th International Conference on Language Resources and Evaluation (LREC 2004), Lisbon, Portugal, Seite 1205-1208. European Language Resources Association (ELRA), (2004)