Electronics Letters
Electronics Letters > 1980 > 16 > 5 > 171 - 172
Electronics Letters > 1983 > 19 > 6 > 200 - 202
Electronics Letters > 1983 > 19 > 12 > 453 - 455
Electronics Letters > 1985 > 21 > 4 > 131 - 132
Electronics Letters > 1989 > 25 > 23 > 1598 - 1600
Electronics Letters > 1991 > 27 > 9 > 729 - 730