2Bharat K, Henznger M R.Improved Algorithms for Topic Distillation in a Hypedinked Environment[C]//Proce-ddings of SIGIR Conference on Research and Development in Information Retrieval New York, 1998:104-111.
3Bra D P ,Houben G, Kornatzky et al. Information Retrieval in Distributed Hypertexts[C].Proceeding of the 4th RIAO Conference, 1994.