TY - CPAPER AU - Petr Brestovsky TI - USING A LIGHT FALLING WEIGHT DEFLECTOMETER FOR THE IDENTIFICATION OF THE SLEEPER SUBSOIL LAYER QUALITY DEGREE IN RAILWAY STRUCTURES T2 - SGEM International Multidisciplinary Scientific GeoConference EXPO Proceedings; 14th SGEM GeoConference on SCIENCE AND TECHNOLOGIES IN GEOLOGY, EXPLORATION AND MINING PY - 2014 DO - 10.5593/sgem2014/b12/s2.131 PB - Stef92 Technology ER -