1. Hazman, M.: A survey of focused crawler approaches. J. Global Res. Comput. Sci. 3(4), 68–72 (2012)
2. Zhou, L., Lin, L.: Survey on the research of focused crawling technique. J. Comput. Appl. 25(9), 1965–1969 (2005)
3. Chakrabarti, S., van den Berg, M., Dom, B.: Focused crawling: a new approach to topic-specific Web resource discovery. In: Proceedings of the 8th International World Wide Web Conference, pp. 1623–1640. Elsevier Science, New York (1999)
4. Balaji, S., Sarumathi, S.: TOPCRAWL—community mining in web search engines with emphasize on topical crawling. In: Proceedings of the International Conference on Pattern Recognition, Informatics and Medical Engineering, Salem, Tamilnadu, 2012, pp. 20–24
5. Chen, H., Chung, Y.M., Marshall, R., Yang, C.C.: An intelligent personal spider(agent)for dynamic Internet searching. Decision Support Syst. 23(1), 41–58 (1998)