Electronics Letters
Electronics Letters > 1990 > 26 > 3 > 188 - 190
Electronics Letters > 1990 > 26 > 10 > 624 - 626
Electronics Letters > 1990 > 26 > 11 > 740 - 742
Electronics Letters > 1991 > 27 > 13 > 1207 - 1209
Electronics Letters > 1992 > 28 > 2 > 139 - 140
Electronics Letters > 1992 > 28 > 3 > 286 - 287