1. Bies, Ann, Mark Ferguson, Karen Katz, and Robert MacIntyre. (1995). Bracketing Guidelines for Treebank II Style. Ms., Department of Computer and Information Science, University of Pennsylvania.
2. Brill, Eric. (1993). A Corpus-based Approach to Language Learning. PhD Dissertation, University of Pennsylvania.
3. Church, Kenneth W. (1980). Memory Limitations in Natural Language Processing, MIT LCS Technical Report 245. Master’s thesis, Massachusetts Institute of Technology.
4. Church, Kenneth W. (1988). A stochastic parts program and noun phrase parser for unrestricted text. In Proceedings of the Second Conference on Applied Natural Language Processing. 26th Annual Meeting of the Association for Computational Linguistics, pages 136–143.
5. Francis, W. Nelson (1964). A Standard Sample of Present-day English for Use with Digital Computers. Report to the U.S Office of Education on Cooperative Research Project No. E-007. Brown University, Providence RI.