Karim Boulabiar (University of Tunis El Manar)
Bas Lemmens (University of Kent)
Agnes Radl (Hochschule Fulda)
Abdelaziz Rhandi (University of Salerno)
Peter Šemrl (University of Ljubljana)
Pedro Tradacete (Instituto de Ciencias Matemáticas)
Vladimir Troitsky (University of Alberta)
Jan Harm van der Walt (University of Pretoria)
Onno Van Gaans (Leiden University)
Foivos Xanthos (Ryerson University)
