@misc{bahers2020temporal, title = {Temporal evolution of indicators (2000–2016). (a): Evolution of imports of minerals (million t); (b): Evolution of cement consumption (million t); (c): Evolution of metals extraction (million t); (d): Evolution of exports of metals (million t): (e): Evolu} author = {Bahers}, url = {https://www.mdpi.com/2071-1050/12/6/2191/htm}, year = {2020} }