#### A Neural Network PES for Protonated Water Cluster (H2O, H3O+, H5O2+, H7O3+, H9O4+)

Reference:
[J. Chem. Theo. Comput. 16 88-99 (2020)](https://pubs.acs.org/doi/abs/10.1021/acs.jctc.9b00805) -
Preprint available on [arxiv](https://arxiv.org/abs/1908.08734).
