Bryon K. Ehlmann Gregory A. Riccardi L. C. Dennis Representing Non-Inheritance Relationships in an Object-Oriented, Scientific Database. 99-109 SSDBM92/P099.pdf 1992 SSDBM db/conf/ssdbm/ssdbm92.html#EhlmannRD92 conf/ssdbm/92 db/conf/ssdbm/EhlmannRD92.html