6Skinder, R. F. The Information Navigation System: a Web-based instruction and reference tool. Internet Reference Services Quarterly, 1997 (2--3): 143--161.
7Shapkin, P. Shapkin, A. Software tools for navigation in document databases. Development of information navigation service based on classification schemes. Third International Conference on Web information systems and technologies, 2007:455--458.
8Roussinov, D.G. Chen, H.C.. Information navigation on the Web by clustering and summarizing query results Information Processing & Management, 2001, 37 (6): 789--816.
