Ríos Flores, Moisés, J.F. Marquez-Rubio, B. del Muro-Cuellar, and E. Aranda-Bricaire. 2018. “Root-Locus Analysis of Delayed First and Second Order Systems”. Enfoque UTE 9 (4):pp. 69 - 76. https://doi.org/10.29019/enfoqueute.v9n4.401.