1.
Bishop, C.M.: Pattern recognition and machine learning. Springer, New York (2006).
2.
Manning, C.D., Raghavan, P., Schütze, H.: Introduction to information retrieval. Cambridge University Press, New York (2008).
3.
Pang-Ning Tan, Michael Steinbach, Vipin Kumar: Introduction to Data Mining, (First Edition). Addison Wesley.
4.
Witten, I.H., Moffat, A., Bell, T.C.: Managing gigabytes: compressing and indexing documents and images. Morgan Kaufman, San Francisco, Ca (1999).