Electronics Letters
Electronics Letters > 1989 > 25 > 16 > 1098 - 1100
Electronics Letters > 1989 > 25 > 23 > 1587 - 1589
Electronics Letters > 1990 > 26 > 6 > 384 - 385
Electronics Letters > 1991 > 27 > 2 > 121 - 123
Electronics Letters > 1992 > 28 > 22 > 2033 - 2034
Electronics Letters > 1992 > 28 > 25 > 2300 - 2302