JOURNAL DE PHYSIQUE IV, vol. 112, page. 861 - 864, 2003-10
SPECTROCHIMICA ACTA PART B-ATOMIC SPECTROSCOPY, vol. 58, no. 8, page. 1445 - 1452, 2003-08-15
JOURNAL OF VACUUM SCIENCE & TECHNOLOGY B, vol. 21, no. 1, page. 183 - 185, 2003-01