Contradiction and Confirmation. - Daniel Poulin; Pierre St-Vincent; Paul Bratley (DEXA, 1993)

A Computational Framework for Dialectical Reasoning. - Pierre St-Vincent; Daniel Poulin; Paul Bratley (ICAIL, 1995)

Negations and Exceptions on Topoï. - Pierre St-Vincent; Paul Bratley; Daniel Poulin (DEXA Workshop, 1998)