AUTHOR=Luo Fanjie , Liu Wei , Qin Ailing , Qu Lingfei , Liu Qunyi TITLE=The supply risk of the global niobium industry chain: propagation path and impact analysis based on multi-layer network JOURNAL=Frontiers in Earth Science VOLUME=12 YEAR=2024 URL=https://www.frontiersin.org/journals/earth-science/articles/10.3389/feart.2024.1490811 DOI=10.3389/feart.2024.1490811 ISSN=2296-6463