1. Toward a theory of indexing—II;Journal of the American Society for Information Science;1970-09
2. Computer Assisted Primary Index Preparation;Journal of Chemical Documentation;1967-11
3. Mathematical analysis of documentation systems;Information Storage and Retrieval;1967-07
4. On the semantic characteristics of information;Information Storage and Retrieval;1965-01
5. A Mechanized Information and Document Retieval System.;Journal of Chemical Documentation;1964-07-01