Electronics Letters
Electronics Letters > 1990 > 26 > 9 > 602 - 604
Electronics Letters > 1990 > 26 > 13 > 919 - 921
Electronics Letters > 1990 > 26 > 24 > 2016 - 2018
Electronics Letters > 1991 > 27 > 20 > 1862 - 1863
Electronics Letters > 1992 > 28 > 17 > 1615 - 1616