Fullmer, W. D.; Dahl, S.; Weber, J. Surrogate Modeling Approach to Uncertainty Quantification for a DEM Model of a Rotating Cubic Tumbler; NETLTRS-5-2019; NETL Technical Report Series; U.S. Department of Energy, NationalEnergy Technology Laboratory: Morgantown, WV, 2019, p 24. DOI: 10.18141/1514272.