Traditional and Modern Methods in pH Control of an Ammonia Scrubber - A Simulation Study. - Jean-Peter Ylén; Pentti Jutila (EUROSIM, 1995)

Comparison of Practical Adaptive Algorithms in pH Control. - Terhi Ylöstalo; Heikki Hyötyniemi; Pentti Jutila; Jean-Peter Ylén (Eur. J. Control, 2001)