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.