A mechanism for efficient evaluation of activitypreconditions in a database environment. - Francisca Antunes; Mauricio Lopez (BDA, 1989)

A Pragmatic Approach for Integrating Data Management and Tasks Management: Modelling and Implementation Issues. - Francisca Antunes; Seán Baker; Brian Caulfield 001; Mauricio Lopez; Mark Sheppard (EDBT, 1990)