1. Berstel, J., Perrin, D., Reutenauer, C.: Codes and Automata. Cambridge University Press, Cambridge (2010)
2. Cao, C.H., Liu, H.Y., Yang, D.: Characterizations of $$k$$-comma codes and $$k$$-comma intercodes. Acta Inf. 53, 23–33 (2016)
3. Cui, B., Kari, L., Seki, S.: $$k$$-Comma codes and their generalizations. Fund. Inf. 107, 1–18 (2011)
4. Delbr, M., Welch, L.R., Golomb, S.W.: Construction and properties of comma-free codes. Matematika 23, 137–160 (1960)
5. Golomb, S.W., Gordon, B.L., Welch, R.: Comma-free codes. Can. J. Math. 10, 202–209 (1958)