| Reference |
R.M.A. Heeren, M.J. de Graaf, D.B. Meyler, D. Ciric, H.J. Hopman and A.W. Kleyn: Sputtering in surface conversion negative ion sources In: Production and Neutralization of Negative Ions and Beams : Sixth International Symposium, Upton, NY November 1992 /ed. J.G. Alessi and A. Hershcovitch, American Institute of Physics, 1994. - pp. 3-15 |
