Fuzzy logic in auto-tuning of fractional PID and backstepping tracking control of a differential mobile robot. - Nemerson D. Bernardes; Felipe A. Castro; Marco Antonio de Souza L. Cuadros; Pablo F. Salarolli; Gustavo Maia de Almeida; Celso José Munaro (J. Intell. Fuzzy Syst., 2019)