Rodriguez, G. A., Obregon, L. G., & Restrepo, J. B. (2018). Linear and Nonlinear Control of an Upflow Anaerobic Sludge Blanket Reactor: Effects of IMC-PID Tuning and Uncertainty . Chemical Engineering Transactions, 70, 1855-1860. https://doi.org/10.3303/CET1870310