Chung Le Viet, Yahiko Kambayashi, Katsumi Tanaka, Shuzo Yajima. Use of abstracted characteristics of data in relational databases. In The IEEE Computer Society's Third International Computer Software and Applications Conference, COMPSAC 1979, 6-8 November, 1979, Chicago, Illinois, USA. pages 409-414, IEEE, 1979. [doi]
Abstract is missing.