Reference author: Axel Tuma

Cimprich, A., Young, S. B., Helbig, C., Gemechu, E. D., Thorenz, A., Tuma, A., & Sonnemann, G. (2017). Extension of geopolitical supply risk methodology: Characterization model applied to conventional and electric vehicles Journal of Cleaner Production, 162. https://doi.org/10.1016/j.jclepro.2017.06.063

Helbig, C., Gemechu, E. D., Pillain, B., Young, S. B., Thorenz, A., Tuma, A., & Sonnemann, G. (2016). Extending the geopolitical supply risk indicator: Application of life cycle sustainability assessment to the petrochemical supply chain of polyacrylonitrile-based carbon fibers Journal of Cleaner Production, 137. https://doi.org/10.1016/j.jclepro.2016.07.214