Citation: V. Vianu, 13TH ANNUAL ACM SIGACT-SIGMOD-SIGART SYMPOSIUM ON PRINCIPLES OF DATABASE-SYSTEMS (PODS) - MAY 24-26, 1994 - EDITORS FOREWORD, Journal of computer and system sciences, 55(2), 1997, pp. 197-197
Citation: S. Grumbach et V. Vianu, TRACTABLE QUERY LANGUAGES FOR COMPLEX OBJECT DATABASES, Journal of computer and system sciences, 51(2), 1995, pp. 149-167