- Urien, J.Y. 1982-5. Le schème syntaxique et sa marque. Application au Breton contemporain, [A Theory of Subordinate and Relative Syntactic Markers, an Application to the Modern Breton Language] Doctorat d'Etat, Rennes 2, ANRT de Lille III.
Stephens (1993): "...Urien (1982) has argued that, the clause and the noun phrase in Breton have common characteristics, observable in the absence of agreement between the verb and its subject in the ordinary finite clause and between the possessor and possessum in the genitive nominal construction."