F. Piroi, et al., M. Lupu, "CLEF-IP 2011: Retrieval in the intellectual property domain", CLEF (Notebook Papers/Labs/Workshop), Amsterdam, The Netherlands, pp.1-16, 2011.
 D. Zhou, J. Liu, S. Zhang, "Query generation techniques for patent prior-art search in multiple languages", Proceedings of the 2nd CCF Conference on Natural Language Processing & Chinese Computing, Springer CCIS series, Chongqing, China, pp.310-321, 2013.
 W. Magdy, et al., "Applying the KISS principle for the CLEF-IP 2010 prior art candidate patent search task", CLEF (Notevook Papers/LABs/Workshops), Padua, Italy, pp.1-7, 2010.
 P. Lopez, L. Romary, "Experiments with citation mining and key-term extraction for prior art search", CLEF (Notebook Papers/LABs/Workshops), Padua, Italy, pp.1-11, 2010.
 X. Xue, W.B. Croft, "Transforming patents into prior-art queries", Proceedings of the 32nd international ACM SIGIR Conference on Research and Development in Information Retrieval, SIGIR'09, Boston, MA, USA, pp.808-809, 2009.
 W. Magdy, P. Lopez, G.J.F. Jones, "Simple vs. sophisticated approaches for patent prior-art search", Proceedings of the 33rd European Conference on Advanees in information Retrieval, ECIR'11, Dublin, Ireland, pp.725-728, 2011.
 P. Mahdabi, L. Andersson, M. Keikha, F. Crestani, "Automatic refinement of patent queries using concept importance predictors", Proceedings of the 35th International ACM SIGIR Conference on Research and Development in Information Retrieval, SIGIR'12, Portland, Oregon, USA, pp.505-514, 2012.
 F. Cacheda, V. Carneiro, et al., "Comparison of collaborative filtering algorithms: Limitations of current techniques and proposals for scalable, high-performance recommender systems", ACM Trans. Web, Vol.5, No.1, pp.2:1-2:33, 2011.
 J. Cao, Z. Wu, Y. Zhuang, B. Mao, Z. Yu, "A novel collaborative filtering using kernel methods for recommender systems", Chinese Journal of Electronics, Vol.21, No.4, pp.609-614, 2012.
 J. Zhong, Q. Sun, X. Li, L. Wen, "A novel feature selection method based on probability latent semantic analysis for chinese text classification", Chinese Journal of Electronics, Vol.20, No.2, pp.228-232, 2011.
 M.A. Hearst, "Texttiling: Segmenting text into multi-paragraph subtopic passages", Comput. Linguist, Vol.23, No.1, pp.33-64, 1997.
 F.Y.Y. Choi, "Advances in domain independent linear text segmentation", Proceedings of the 1st North American Chapter of the Association for Computational Linguistics Conference, NAACL 2000, Seattle, Washington, pp.26-33, 2000.