On Groups which are Syntactic Monoids of Deterministic Context-Free Languages. - Claas E. Röver (Int. J. Algebra Comput., 2004)

Groups with Indexed Co-word Problem. - Derek F. Holt; Claas E. Röver (Int. J. Algebra Comput., 2006)

Groups with Context-Free Conjugacy Problems. - Derek F. Holt; Sarah Rees; Claas E. Röver (Int. J. Algebra Comput., 2011)

Groups, Languages and Automata - Derek F. Holt; Sarah Rees; Claas E. Röver (Cambridge University Press, 2017)