D. Costa, H. Passos, S. Peres, and C. Lima.
" A comparative study of feature level fusion strategies for Multimodal Biometric Systems based on Face and Iris", in <em>Proceedings of the 11th Brazilian Symposium on Information Systems</em>, Goiânia, 2015, pp. 219-226, doi: <a href="https://doi.org/10.5753/sbsi.2015.5820">https://doi.org/10.5753/sbsi.2015.5820</a>.