[Horev et al. "Geometry-Aware Principal Component Analysis for Symmetric Positive Definite Matrices." Machine Learning, 2017.](https://mlanthology.org/mlj/2017/horev2017mlj-geometryaware/) doi:10.1007/S10994-016-5605-5
@article{horev2017mlj-geometryaware,
title = {{Geometry-Aware Principal Component Analysis for Symmetric Positive Definite Matrices}},
author = {Horev, Inbal and Yger, Florian and Sugiyama, Masashi},
journal = {Machine Learning},
year = {2017},
pages = {493-522},
doi = {10.1007/S10994-016-5605-5},
volume = {106},
url = {https://mlanthology.org/mlj/2017/horev2017mlj-geometryaware/}
}