P. Olivier, S. Ananiadou, T. Maeda, and J. Tsujii. ISI, volume 7 of Schriften zur Informationswissenschaft, page 324-337. Hochschulverband für Informationswissenschaft, (1992)
I. Korkontzelos, T. Mu, A. Restificar, and S. Ananiadou. Proceedings of the ACM fifth international workshop on Data and text mining in biomedical informatics, page 43--50. New York, NY, USA, ACM, (2011)