Roumen Zlatev. "NANOSTUCTURED QCM SENSOR FOR TRYPSIN ACTIVITY DETERMINATION." SGEM International Multidisciplinary Scientific GeoConference EXPO Proceedings; 13th SGEM GeoConference NANO, BIO AND GREEN   TECHNOLOGIES FOR A SUSTAINABLE FUTURE (2013). https://doi.org/10.5593/sgem2013/bf6/s25.018