https://hal-upec-upem.archives-ouvertes.fr/hal-00619356 Contributor : Jean BerstelConnect in order to contact the contributor Submitted on : Tuesday, September 6, 2011 - 11:08:33 AM Last modification on : Saturday, January 15, 2022 - 3:56:01 AM
Jean Berstel. Une hiérarchie des parties rationnelles de ${N}^{2}$. Mathematical Systems Theory, Springer-Verlag, 1973, 7 (1), pp.114-137. ⟨hal-00619356⟩