Our paper can be found here: Path-Integral Formula for Computing Koopman Eigenfunctions To cite our work
@inproceedings{deka2023path,
title={Path-integral formula for computing Koopman eigenfunctions},
author={Deka, Shankar A and Narayanan, Sriram SKS and Vaidya, Umesh},
booktitle={2023 62nd IEEE Conference on Decision and Control (CDC)},
pages={6641--6646},
year={2023},
organization={IEEE}
}