Medieval Latin
He was first appointed lecturer, then assistant (1967), and finally obtained a chair in Latin Philology (1976) at the University of Barcelona. His research was devoted to Medieval Latin (particularly Hispanic Medieval Latin) and to preliterary Catalan. He was director (1960-1985) of the "Glossarium Mediae Latinitatis Cataloniae", a dictionary of the Medieval Latin of Catalonia, a research project which is part of the global project "Novum Glossarium Mediae Latinitatis" of the Union Académique Internationale.