V. Lourenço, G. Silva, and L. Fernandes.
" Hierarchy-of-Visual-Words: a Learning-based Approach for Trademark Image Retrieval", in Anais Estendidos da XXXII Conference on Graphics, Patterns and Images, Rio de Janeiro, 2019, pp. 211-214, doi: https://doi.org/10.5753/sibgrapi.est.2019.8332.