Soft Sensors in the Primary Aluminum Production Process Based on Neural Networks Using Clustering Methods. - Alan Marcel Fernandes de Souza; Fábio Mendes Soares; Marcos Antonio Gomes de Castro; Nilton Freixo Nagem; Afonso Henrique de Jesus Bitencourt; Carolina de M. Affonso; Roberto Célio Limão de Oliveira (Sensors, 2019)