Gilles Triscone (Maple)
Francisco Guinea (CSIC, Madrid) (Arovas)
Michael Coey, Univ. of Dublin (Berkowitz, Hellman )
Yvan Jaccard, University of Neuchatel, Switzerland;
Jan Genossar , Technion Institute of Technology, Israel;
Jose Vicent , Universidad Complutense, Madrid, Spain;
Jose Martin , Universidad Complutense, Madrid, Spain;
Michel Viret (Schuller)