Electronics Letters
Electronics Letters > 1990 > 26 > 12 > 789 - 791
Electronics Letters > 1992 > 28 > 7 > 623 - 625
Electronics Letters > 1992 > 28 > 17 > 1618 - 1619
Electronics Letters > 1993 > 29 > 21 > 1819 - 1821
Electronics Letters > 1993 > 29 > 22 > 1914 - 1915
Electronics Letters > 2014 > 50 > 25 > 1986 - 1988