Control Theory and Applications, IEE Proceedings D
IEE Proceedings D - Control Theory and Applications > 1981 > 128 > 5 > 173 - 180
IEE Proceedings D - Control Theory and Applications > 1981 > 128 > 5 > 219 - 222
IEE Proceedings D - Control Theory and Applications > 1981 > 128 > 5 > 215 - 218