John Pollock:
Degrees of justification
Gerard Vreeswijk:
Approximate defeasible reasoning
Bob Kowalski:
Abstract Argumentation
Henry Prakken:
Accrual of arguments
Thomas F. Gordon:
The Zeno Argumentation Framework: argument mediation on the World-Wide Web
Jaap Hage, Arno Lodder, Bart Verheij:
Argument in Maastricht
Maastricht Argument Day