Varieties of comma-free codes. - Christian J. Michel; Giuseppe Pirillo; Mario A. Pirillo (Comput. Math. Appl., 2008)

A relation between trinucleotide comma-free codes and trinucleotide circular codes. - Christian J. Michel; Giuseppe Pirillo; Mario A. Pirillo (Theor. Comput. Sci., 2008)

A classification of 20-trinucleotide circular codes. - Christian J. Michel; Giuseppe Pirillo; Mario A. Pirillo (Inf. Comput., 2012)