Duchén Sánchez, G., B. del Muro Cuellar, J. F. Marquez Rubio, M. Velasco Villa, and M. A. Hernández Pérez. “Observer-Based PD Controller for a Class of High Order Linear Unstable Delayed Systems”. IEEE Latin America Transactions, vol. 20, no. 2, Sept. 2021, pp. 291-00, https://latamt.ieeer9.org/index.php/transactions/article/view/5641.