Fed:10.1109/6.570822
Fed:10.1109/CDC.1972.268934
Fed:10.1109/CDC.1973.269211
Fed:10.1109/CDC.1976.267752
Fed:10.1109/CDC.1976.267754
Fed:10.1109/JSAC.1986.1146415
Fed:10.1109/WSC.2006.323155