Guerrero, Cuauhtémoc, Víctor Santibañez, Yutzil Araiza-Olvera, Edgar Ibarra-Figueroa, and Belén Pérez-Pérez. 2020. “Control of Velocity of DC Motors by Classical and Passivity Methods Measuring Only Position: Theory and Experimental Comparison”. IEEE Latin America Transactions 18 (5):962-70. https://latamt.ieeer9.org/index.php/transactions/article/view/3038.