G. Siolas, and F. d'Alché Buc. IJCNN '00: Proceedings of the IEEE-INNS-ENNS International Joint Conference on Neural Networks (IJCNN'00)-Volume 5, page 5205. Washington, DC, USA, IEEE Computer Society, (2000)
X. Li, and D. Roth. Proceedings of the 19th international conference on Computational linguistics, page 1--7. Morristown, NJ, USA, Association for Computational Linguistics, (2002)