Hendrik Decker, Juan Carlos Casamayor. Sustained Models and Sustained Answers in First-Order Databases. In María Alpuente, Roberto Barbuti, Isidro Ramos, editors, 1994 Joint Conference on Declarative Programming, GULP-PRODE 94 Peñiscola, Spain, September 19-22, 1994, Volume 2. pages 32-46, 1994.
Abstract is missing.