17th Chemical Engineering and Catalysis World Forum,London, United Kingdom

26th 21st International Scientific GeoConference SGEM 2021,Varna, Bulgaria

1st International Conference on Mining and Mineralogy,Munich, Germany

2nd 8th International Conference on Mining, Material, and Metallurgical Engineering (MMME’21),Hlavni Mesto Praha, Czech Republic

3rd 2nd Material Science and Nanotechnology Conference,Barcelona, Spain

7th 21st International Scientific GeoConference SGEM Vienna Green 2021,Wien, Austria