Petr Brestovsky. "USING A LIGHT FALLING WEIGHT DEFLECTOMETER FOR THE IDENTIFICATION OF THE SLEEPER SUBSOIL LAYER QUALITY DEGREE IN RAILWAY STRUCTURES." SGEM International Multidisciplinary Scientific GeoConference EXPO Proceedings; 14th SGEM GeoConference on SCIENCE AND TECHNOLOGIES IN GEOLOGY, EXPLORATION AND MINING, 2014. https://doi.org/10.5593/sgem2014/b12/s2.131