Simulation and control of flotation circuits. - Antti J. Niemi; U. Paakkinen (Autom., 1969)

A linear-quadratic-Gaussian control algorithm for sulphide ore grinding. - Raimo Ylinen; Antti J. Niemi; Timo Iivarinen (Autom., 1987)

Automatic observation of the dry line in paper machine. - Jouko Berndtson; Antti J. Niemi (ICPR, 1996)