Asking about Negative Knowledge. - Ulf Sundin (SCAI, 1989)

A Rule Language to Capture and Model Business Policy Specifications. - Peter McBrien; Marc Niézette; Dionysios Pantazis; Anne Helga Seltveit; Ulf Sundin; Babis Theodoulidis; Gregoris Tziallas; Rolf Wohed (CAiSE, 1991)

Designing User Interfaces for Applications based on the Hint Architecture. - Ulf Sundin; Peter Nordin; Shahab Ghavami (AIRTC, 1994)