TY - CPAPER AU - А. А. Заикин TI - SEQUENTIAL FIRST-CROSSING PROCEDURE FOR ASSESSING THE PERCENTAGE OF TOXIC ELEMENTS IN PRODUCTS T2 - SGEM International Multidisciplinary Scientific GeoConference EXPO Proceedings; 19th International Multidisciplinary Scientific GeoConference SGEM2019, Ecology, Economics, Education and Legislation PY - 2019 SP - 679 EP - 686 DO - 10.5593/sgem2019/5.2/s20.085 PB - STEF92 Technology ER -