American Institute of Physics
J.G. Alessi , A. Hershcovitch

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