Electronics Letters
Electronics Letters > 1982 > 18 > 14 > 613 - 614
Electronics Letters > 1987 > 23 > 5 > 242 - 244
Electronics Letters > 1989 > 25 > 2 > 136 - 137
Electronics Letters > 1989 > 25 > 18 > 1257 - 1259
Electronics Letters > 1991 > 27 > 7 > 557 - 558
Electronics Letters > 1993 > 29 > 21 > 1890 - 1891