[Haasdonk and Burkhardt. "Invariant Kernel Functions for Pattern Analysis and Machine Learning." Machine Learning, 2007.](https://mlanthology.org/mlj/2007/haasdonk2007mlj-invariant/) doi:10.1007/S10994-007-5009-7
@article{haasdonk2007mlj-invariant,
title = {{Invariant Kernel Functions for Pattern Analysis and Machine Learning}},
author = {Haasdonk, Bernard and Burkhardt, Hans},
journal = {Machine Learning},
year = {2007},
pages = {35-61},
doi = {10.1007/S10994-007-5009-7},
volume = {68},
url = {https://mlanthology.org/mlj/2007/haasdonk2007mlj-invariant/}
}