Capability of a Recurrent Deep Neural Network Optimized by Swarm Intelligence Techniques to Predict Exceedances of Airborne Pollution (PMx) in Largely Populated Areas. - Gerardo Javier Kuri-Monge; Marco Antonio Aceves-Fernández; Julio Alberto Ramírez Montañez; Jesús Carlos Pedraza-Ortega (ICIT, 2021)