Neil Ireson, Fabio Ciravegna, Marie Elaine Califf, Dayne Freitag, Nicholas Kushmerick, Alberto Lavelli: Evaluating Machine Learning for Information Extraction, 22nd International Conference on Machine Learning (ICML 2005), Bonn, Germany, 7-11 August, 2005
S. Huffman. Connectionist, Statistical, And Symbol Approaches to Learning for
Natural Language Processing, volume 1040, page 246-260. Springer, (1996)