@article{multifidelitycovarianceestimationvia,
  title = {Multifidelity Covariance Estimation via Regression on the Manifold of Symmetric Positive Definite Matrices},
  author = {Aimee Maurais and Terrence Alsup and Benjamin Peherstorfer and Youssef Marzouk},
  year = {2023},
  eprint = {2307.12438},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2307.12438v3},
}