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

de Graaf, M. J., Qing, Z., van Rooij, G. J., van de Sanden, M. C. M., Schram, D. C., Heeren, R., & Kleyn, A. W. (1994). Rotational and gas temperatures in a surface conversion negative ion source. In J. G. Alessi & A. Hershcovitch (Eds.), Production and Neutralization of Negative Ions and Beams : Sixth International Symposium, Upton, NY November 1992 (pp. 588–594).