Comment on A tight distance-dependent estimator for screening three-center Coulomb integrals over Gaussian basis functions [J. Chem. Phys. 142, 154106 (2015)]

We extend the tight distance-dependent estimator proposed by Hollman et al. [J. Chem. Phys. 142, 154106 (2015)] for the three-center Coulomb integrals over Gaussian atomic orbitals to handle the two-center case. We also propose minor modifications of the original three-center estimator for the case of contracted ket Gaussians and concentric bra Gaussians.