Ernst J. Schuegraf, H. S. Heaps Query processing in a retrospective document retrieval system that uses word fragments as language elements. [Citation Graph (1, 0)][DBLP] Inf. Process. Manage., 1976, v:12, n:4, pp:283-292 [Journal]
Ernst J. Schuegraf Compression of large inverted files with hyperbolic term distribution. [Citation Graph (0, 0)][DBLP] Inf. Process. Manage., 1976, v:12, n:6, pp:377-384 [Journal]
Ernst J. Schuegraf, H. S. Heaps A comparison of algorithms for data base compression by use of fragments as language elements. [Citation Graph (0, 0)][DBLP] Information Storage and Retrieval, 1974, v:10, n:9-10, pp:309-319 [Journal]