1. Burnside groups of odd exponent and irreducible systems of group identities;Adjan,1973
2. The Burnside Problem and Identities in Groups;Adjan,1979
3. Very small families of algebraic nonrational languages;Autebert,1980
4. J. Beauquier, M. Blattner and M. Latteux, On commutative context-free languages, to appear.
5. Transductions and Context-free Languages;Berstel,1979