M. Yahya, K. Berberich, S. Elbassuoni, M. Ramanath, V. Tresp, and G. Weikum. Proceedings of the 2012 Joint Conference on Empirical Methods in Natural Language Processing and Computational Natural Language Learning, page 379--390. Stroudsburg, PA, USA, Association for Computational Linguistics, (2012)
H. Bast, A. Chitea, F. Suchanek, and I. Weber. Proceedings of the 30th annual international ACM SIGIR conference on Research and development in information retrieval, page 671--678. ACM, (2007)