Electronics Letters
Electronics Letters > 1993 > 29 > 9 > 822 - 824
Electronics Letters > 2002 > 38 > 24 > 1515 - 1516
Electronics Letters > 2014 > 50 > 22 > 1585 - 1587
Electronics Letters > 2016 > 52 > 8 > 592 - 594
Electronics Letters > 2017 > 53 > 17 > 1190 - 1192