Electronics Letters
Electronics Letters > 1983 > 19 > 6 > 196 - 197
Electronics Letters > 1986 > 22 > 2 > 115 - 116
Electronics Letters > 1986 > 22 > 4 > 189 - 190
Electronics Letters > 1987 > 23 > 20 > 1079 - 1081
Electronics Letters > 1991 > 27 > 16 > 1453 - 1454