1. DEPARTAMENTO DE INGENIERÍA MATEMÁTICA; UNIVERSIDAD ANDRES BELLO; SANTIAGO CHILE
2. CNRS, LIP, ENS DE LYON
3. PROJECT COATI,; I3S (CNRS, UNS) AND INRIA,; SOPHIA ANTIPOLIS France
4. INSTITUTE FOR COMPUTER SCIENCE AND CONTROL,; HUNGARIAN ACADEMY OF SCIENCES (MTA SZTAKI)