1. Host-enhanced chemical indexing in technical databases;Badger;Journal of Chemical Information and Computer Science,1989
2. Problems connected with free-text searching in CAS;Bechtel,1990
3. Entwicklung und anwendung des automatischen indexierungssystems AIR/PHYS;Biebricher;Nachrichten für dokumentation,1988
4. The Automatic Indexing System AIR/PHYS — From Research to Application;Biebricher,1988
5. Full text retrieval: Evaluation and implications;Blair;International Classification,1986