1. On clustering techniques of citation graphs;Preparata,1967
2. Information retrieval based upon latent class analysis;Baker;J.A.C.M,1962
3. Some clumping experiments for associative document retrieval;Dale;Am. Docum.,1965
4. Conference on cluster analysis, New Orleans, La.;Lorr,1967
5. A modified method of latent class analysis for file organization in information retrieval;Winters;J.A.C.M.,1962