Electronics Letters
Electronics Letters > 1989 > 25 > 16 > 1047 - 1048
Electronics Letters > 1989 > 25 > 17 > 1175 - 1177
Electronics Letters > 1989 > 25 > 21 > 1447 - 1449
Electronics Letters > 1989 > 25 > 22 > 1529 - 1530
Electronics Letters > 1990 > 26 > 23 > 1977 - 1978
Electronics Letters > 1992 > 28 > 12 > 1160 - 1162