The following publications are possibly variants of this publication:
- Constraint Programming and Database Query LanguagesParis C. Kanellakis, Dina Q. Goldin. tacs 1994: 96-120
- Constraint Query LanguagesParis C. Kanellakis, Gabriel M. Kuper, Peter Z. Revesz. jcss, 51(1):26-52, 1995.
- Safe Query Languages for Constraint DatabasesPeter Z. Revesz. TODS, 23(1):58-99, 1998. [doi]
- Linear vs Polynomial Constraints in Database Query LanguagesFoto N. Afrati, Stavros S. Cosmadakis, Stéphane Grumbach, Gabriel M. Kuper. ppcp 1994: 181-192