IEEE PHOTONICS TECHNOLOGY LETTERS, vol. 8, no. 9, page. 1133 - 1135, 1996-09
JOURNAL OF APPLIED PHYSICS, vol. 80, no. 4, page. 2296 - 2299, 1996-08-15
IEEE PHOTONICS TECHNOLOGY LETTERS, vol. 8, no. 7, page. 852 - 854, 1996-07
ELECTRONICS LETTERS, vol. 32, no. 11, page. 1007 - 1008, 1996-05-23