Covariance Matrix of a Double-Differential Doppler-Broadened Elastic Scattering Cross SectionG. Arbanas, B. Becker, R. Dagan, M.E. Dunn, N.M. Larson, L.C. Leal and M.L. WilliamsEPJ Web of Conferences, 27 (2012) 00006DOI: https://doi.org/10.1051/epjconf/20122700006