Electronics Letters
Electronics Letters > 1990 > 26 > 14 > 962 - 964
Electronics Letters > 1991 > 27 > 3 > 204 - 205
Electronics Letters > 1991 > 27 > 22 > 2046 - 2048
Electronics Letters > 1992 > 28 > 10 > 908 - 909
Electronics Letters > 1993 > 29 > 8 > 658 - 660