1. Quelques problems ouverts en theorie des languages algebriques;Autebert;RAIRO Informatique Théorique/Theoretical Informatics,1979
2. Very small families of algebraic nonrational languages;Autebert,1980
3. Solution to Problem 5030;Braunholtz;Amer. Math. Monthly,1963
4. Uniform tag sequences;Cobham;Math. Systems Theory,1972
5. On the subword complexity and square-freeness of formal languages;Ehrenfeucht,1981