Hidalgo, Denisse, Oscar Castillo, and Patricia Melin. 2013. “Type-1 and Type-2 Fuzzy Inference Systems As Integration Methods in Modular Neural Networks for Multimodal Biometry and Its Optimization With Genetic Algorithms”. Journal of Automation, Mobile Robotics and Intelligent Systems 2 (1): 59-73. https://jamris.d.tomp.pl/index.php/JAMRIS/article/view/511.