He was appointed as ( one month ) Professeur de premi�re classe, at different French Universities, such as Toulouse, Nancy, Pau, Metz, Tours, Poitiers, Paris VI, Montpellier . . . He organized many French-Spanish Congresses on various topics, French-Spanish Workshops on Numerical Simulation ( J . L . Lions French-Spanish Workshops on Numerical Simulation ), etc . Their Proceedings became several prestigious books of reference.
