Credulous and Autoepistemic Reasoning Using Ordered Logic. - P. Geerts; Dirk Vermeir (LPNMR, 1991)

A Nonmonotonic Reasoning Formalism Using Implicit Specificity Information. - P. Geerts; Dirk Vermeir (LPNMR, 1993)

Ordered logic: defeasible reasoning for multiple agents. - P. Geerts; Dirk Vermeir; Donald Nute (Decis. Support Syst., 1994)

Specificity by Default. - P. Geerts; Dirk Vermeir (ECSQARU, 1995)