AUTHOR=Jia Xiangying , Liu Chonghao , Li Tianjiao , Liu Jing , Wang Xiu TITLE=The impact of country risk on nickel supply chain: based on complex network and panel regression analysis JOURNAL=Frontiers in Earth Science VOLUME=12 YEAR=2024 URL=https://www.frontiersin.org/journals/earth-science/articles/10.3389/feart.2024.1487521 DOI=10.3389/feart.2024.1487521 ISSN=2296-6463