Gradevinska Knjiga
B. Perovic , D. Tosic

Schram, B. L, Boerboom, A. J. H, Kleine, W, & Kistemaker, J. (1966). Amplification factors of a particle multiplier for multiply charged noble gas ions. In B Perovic & D Tosic (Eds.), Proceedings of the Seventh International Conference on Phenomena in Ionized Gases. Beograd, 22-27 August 1965, Vol. 1 (pp. 170–175). Gradevinska Knjiga.