On the correctness of mathematical models of time-of-flight cathodoluminescence of direct-gap semiconductorsMikhail A. Stepovich, Dmitry V. Turtin, Elena V. Seregina and Veronika V. KalmanovichITM Web Conf., 30 (2019) 07014DOI: https://doi.org/10.1051/itmconf/20193007014