1. Abramowicz, W., Kalczynski, P., Kaczmarek, T., Wecel, K.: Time-indexer: a tool for extracting temporal references from text documents. In: The Information Resources Management Assciation International Conference 2003, pp. 832–835 (2003)
2. Abramowicz, W., Kalczynski, P.J., Wecel, K.: Filtering the Web to Feed Data Warehouses. Springer, New York, Inc., Secaucus, NJ, USA (2002)
3. Allen, J.F.: Maintaining knowledge about temporal intervals. Commun. ACM 26(11), 832–843 (1983)
4. Baeza-Yates, R., Ribeiro-Neto, B.: Modern Information Retrieval. Addison Wesley, Reading (1999)
5. Dalli, A., Wilks, Y.: Automatic dating of documents and temporal text classification. In: Proceedings of the Workshop on Annotating and Reasoning about Time and Events. Association for Computational Linguistics, Sydney, Australia, July 2006, pp. 17–22 (2006)