Vanrolleghem, P., Dochain, D., Vermeersch, L. K., & Vansteenkiste, G. C. (1993). Modelling of a nonlinear distributed parameter bioreactor: optimisation of a nutrient removal process. Proc. European Simulation Multiconference, 563-567. https://hdl.handle.net/2078.5/60219 (Original work published 1993)