TY  - CONF
AU  - International authors
TI  - 21st International Multidisciplinary Scientific GeoConference SGEM 2021, Ecology, Environmental Economics, Education, and Legislation, Vol. 21, Issue 5.1
PY  - 2021
DO  - 10.5593/sgem2021/5.1
PB  - STEF92 Technology
ER  -