Our study on using the heat-bath flavor of selected CI to compute protonic densities of multicomponent systems has been published in JCTC. We are pretty pleased with the results from this study and learned a lot that we hope to follow up on with regards to the need for non HF-orbitals for multicomponent calculations. Go check it out here: https://pubs.acs.org/doi/10.1021/acs.jctc.9b01273
A theoretical chemistry group at the University of Missouri.