Electronics Letters
Electronics Letters > 1989 > 25 > 9 > 609 - 610
Electronics Letters > 1989 > 25 > 19 > 1302 - 1303
Electronics Letters > 1989 > 25 > 22 > 1496 - 1498
Electronics Letters > 1990 > 26 > 14 > 1061 - 1063
Electronics Letters > 1991 > 27 > 1 > 40 - 41
Electronics Letters > 1993 > 29 > 11 > 961 - 963