Path Algorithms on Regular Graphs. - Didier Caucal; Dinh Trong Hieu (FCT, 2007)

Regularity and Context-Freeness over Word Rewriting Systems. - Didier Caucal; Dinh Trong Hieu (FoSSaCS, 2011)

Grammaires de graphes et langages formels. (Graph grammars and formal languages). - Dinh Trong Hieu (2011)