The Genetic Code Revisited: Inner-to-Outer Map, 2D-Gray Map, and World-Map Genetic Representations. - Hélio M. de Oliveira; N. S. Santos-Magalhães (ICT, 2004)

Genomic Imaging Based on Codongrams and a^2grams. - E. A. Bouton; Hélio M. de Oliveira; Ricardo M. Campello de Souza; N. S. Santos-Magalhães (CoRR, 2015)