1. Büttcher, S., Clarke, C.L.A., Cormack, G.V.: Information Retrieval: Implementing and Evaluating Search Engine. MIT Press, Cambridge (2010)
2. Weiss, S.M., Indurkhya, N., Zhang, T., Damerau, F.J.: Text Mining - Predictive Methods for Analyzing Unstructured Information. Springer, New York (2005)
3. Eifring, H., Theil, R.: Linguistics for Students of Asian and African Languages (2005)
4. Grandy, R.E., Warner, R.: Paul grice. http://plato.stanford.edu/entries/grice/ , May 2006. Accessed 02 Oct 2012
5. Searle, J.R.: Intentionality: An Essay in the Philosophy of Mind. Cambridge University Press, Cambridge (1983)