Electronics Letters
Electronics Letters > 1986 > 22 > 17 > 904 - 905
Electronics Letters > 1989 > 25 > 16 > 1086 - 1088
Electronics Letters > 1991 > 27 > 1 > 48 - 49
Electronics Letters > 1992 > 28 > 12 > 1177 - 1178
Electronics Letters > 1993 > 29 > 21 > 1825 - 1826