1. E. S. Gardner The Case of the Demure Defendant
2. TORUS: A step toward bridging the gap between databases and the casual user;Mylopoulos;Inf. Syst.,1976
3. T. Strzalkowski
4. SHADOW: A natural language query analyser;Hadley;Comput. Math.,1985
5. B. Webber et al. Extended natural language database interactions, in N. Cercone, (ed.) Computational Linguistics