Systems & Control Letters
Systems & Control Letters > 1995 > 25 > 2 > 79-87
Systems & Control Letters > 1995 > 25 > 2 > 141-149
Systems & Control Letters > 1995 > 25 > 2 > 125-129
Systems & Control Letters > 1996 > 28 > 1 > 1-6
Systems & Control Letters > 1996 > 28 > 3 > 167-172
Systems & Control Letters > 1997 > 29 > 4 > 197-205