F. Wendt, A. Rocha, and M. Omai.
" On Rainbow Coloring of Quadrilateral Snake Graphs", in <em>Anais do XI Encontro de Teoria da Computação</em>, Gramado/RS, 2026, pp. 199-203, doi: <a href="https://doi.org/10.5753/etc.2026.23552">https://doi.org/10.5753/etc.2026.23552</a>.