Berstel has been a member of the Lothaire group of mathematicians that developed the foundations of combinatorics of words. He has published several scientific monographs, including
Transductions and Context-free Languages (1979),[2]Theory of Codes (1985, jointly with Dominique Perrin),[3] and Codes and Automata (2009; jointly with Dominique Perrin and Christophe Reutenauer)[4]
as well as the three Lothaire books.[5][6][7]
^Berstel, Jean; Perrin, Dominique (1985). Theory of Codes. Pure and Applied Mathematics. Vol. 117. Academic Press. ISBN978-0-120-93420-1.
^Berstel, Jean; Perrin, Dominique; Reutenauer, Christophe (2009). Codes and Automata. Encyclopedia of Mathematics and its Applications. Vol. 129. Cambridge University Press. ISBN978-0-521-88831-8.