1. [1] Alexander, J.E. and Tate, M.A.: Web wisdom: How to evaluate and create information quality on the Web, Lawrence Erlbaum Associates Inc., Hillsdale, NJ, USA, 1st edition (1999).
2. [2] Borko, H. and Bernick, M.: Automatic Document Classification, J. ACM, Vol.10, pp.151-162 (online), DOI: http://doi.acm.org/10.1145/321160.321165 (1963).
3. [3] Bradley, A.P.: The Use of the Area Under the ROC Curve in the Evaluation of Machine Learning Algorithms, Pattern Recogn., Vol.30, No.7, pp.1145-1159 (1997).
4. [4] Economics and Statistics Division of World Intellectual Property Organization: World Intellectual Property Indicators 2010 (2010).
5. [5] Economics and Statistics Division of World Intellectual Property Organization: World Intellectual Property Indicators 2011 (2011).