V. Lourenço, G. Silva, and L. Fernandes.
" Hierarchy-of-Visual-Words: a Learning-based Approach for Trademark Image Retrieval", in <em>Anais da XXXII Conference on Graphics, Patterns and Images</em>, Rio de Janeiro, 2019, doi: <a href="https://doi.org/10.5753/sibgrapi.2019.9803">https://doi.org/10.5753/sibgrapi.2019.9803</a>.