Aguilar-Lopez, R., Ma. L. Neria-Gonzalez, and G. Soto-Corte. “Tracking Substrate Trajectories in Continuous Aerobic Wastewater Reactors via Nonlinear PI Controllers”. Journal of Applied Research and Technology 4, no. 01 (April 1, 2006). Accessed April 3, 2025. https://jart.icat.unam.mx/index.php/jart/article/view/545.