ELECTRONICS LETTERS, vol. 30, no. 9, page. 739 - 740, 1994-04-28
ELECTRONICS LETTERS, vol. 36, no. 3, page. 262 - 264, 2000-02-03
ELECTRONICS LETTERS, vol. 46, no. 2, page. 156 - 157, 2010-01-21
ELECTRONICS LETTERS, vol. 45, no. 14, page. 755 - 756, 2009-07-02
ELECTRONICS LETTERS, vol. 34, no. 11, page. 1152 - 1153, 1998-05-28
ELECTRONICS LETTERS, vol. 39, no. 6, page. 566 - 567, 2003-03-20
ELECTRONICS LETTERS, vol. 35, no. 19, page. 1676 - 1678, 1999-09-16
ELECTRONICS LETTERS, vol. 48, no. 22, page. 1415 - 1416, 2012-10-25
ELECTRONICS LETTERS, vol. 36, no. 23, page. 1974 - 1975, 2000-11-09
ELECTRONICS LETTERS, vol. 33, no. 22, page. 1909 - 1910, 1997-10-23
ELECTRONICS LETTERS, vol. 40, no. 24, page. 1556 - 1558, 2004-11-25