FINE, J., LÖRINČÍK, J., ANDREADIS, T. D., FRANZREB, K., ŠROUBEK, Z. High-Energy Electron Emission from Ion-Bombarded Surfaces of Ga, Ge, In, and Sn. Nuclear Instruments & Methods in Physics Research Section B. 1997, 122(2), 199-214. ISSN 0168-583X. E-ISSN 1872-9584.