L. Schubert. Proceedings of the second international conference on Human Language Technology Research, стр. 94--97. San Francisco, CA, USA, Morgan Kaufmann Publishers Inc., (2002)
L. Schubert, и M. Tong. Proceedings of the HLT-NAACL 2003 workshop on Text meaning, стр. 7--13. Morristown, NJ, USA, Association for Computational Linguistics, (2003)