J. Han, M. Kamber, and A. K. H. Tung. Geographic Data Mining and Knowledge Discovery, chapter Spatial Clustering Methods in Data Mining: A Survey, pages 1–29. Taylor and Francis, 2001. [url]
M. Hedderich, L. Lange, H. Adel, J. Strötgen, and D. Klakow. Proceedings of the 2021 Conference of the North American Chapter of the Association for Computational Linguistics: Human Language Technologies, page 2545--2568. Online, Association for Computational Linguistics, (June 2021)