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IEEE Transactions on Automatic Control > 2009 > 54 > 7 > 1648 - 1653
Electronics Letters > 1993 > 29 > 12 > 1046 - 1048
IEE Proceedings D - Control Theory and Applications > 1988 > 135 > 4 > 309 - 322
IEE Proceedings D - Control Theory and Applications > 1988 > 135 > 4 > 309 - 322