Edgar Roman-Rangel, Ángel Fernando Kuri Morales, José Francisco Martínez Trinidad, Jesús Ariel Carrasco-Ochoa, José Arturo Olvera-López: Pattern Recognition - 13th Mexican Conference, MCPR 2021, Mexico City, Mexico, June 23-26, 2021, Proceedings. Lecture Notes in Computer Science 12725, Springer 2021, ISBN 978-3-030-77003-7