Editor of a special issue of the Journal of Applied Logics (with Ricardo Silvestre)
Formal Approaches to the Ontological Argument

Editor of a special issue of Logica Universalis (with Jens Lemanski)
The Cretan Square

Editor of a special issue of Sophia (with Ricardo Silvestre)
Logic and Philosophy of Religion

Editor of a special issue of Logica Universalis (with Manuel Correia)
The Square of Opposition - Fifth World Congress, Esater Island, 2016,

Editor of a special issue of Logica Universalis (with Raffaela Giovagnoli)
The Vatican Square

Editor of a special issue of Synthese (with Decio Krause)
New trends in the foundations of science

Editor of a special issue of Logica Universalis
The Hexagon o Opposition

Editor of a special issue of History and Philosophy of Logic (with Stephen Read)
Square of Opposition: A Diagram and a Theory in Historical Perspective

Editor of a special issue of Logica Universalis (with Gillman Payette)
The Square of Opposition - First World Congress, Montreux 2007

Editor of a special issue of the Journal of Applied Non-Classical Logics (with Alexandre Costa-Leite)
Uses of Non-Classical Logic: Foundational Issues

Editor of a special issue of IGPL on Combination of Logics
The Challenge of Combining Logics