1. Department for Management of Science and Technology Development, Ton Duc Thang University, Ho Chi Minh City, Vietnam
2. Faculty of Applied Sciences, Ton Duc Thang University, Ho Chi Minh City, Vietnam
3. Department of Mining Engineering, Federal University of Technology, Akure, Nigeria
4. Oulu Mining School, University of Oulu, Oulu, Finland
5. Clean Coal and Sustainable Energy Research Group, University of the Witwatersrand, Johannesburg, South Africa
6. Division of Mining and Geotechnical Engineering, Department of Civil, Environmental and Natural Resources Engineering, Luleå University of Technology, Luleå, Sweden