Electronics Letters
Electronics Letters > 1990 > 26 > 7 > 467 - 468
Electronics Letters > 1990 > 26 > 8 > 497 - 498
Electronics Letters > 1991 > 27 > 2 > 121 - 123
Electronics Letters > 1991 > 27 > 7 > 566 - 568
Electronics Letters > 1992 > 28 > 4 > 403 - 405
Electronics Letters > 1993 > 29 > 13 > 1173 - 1174