### Description Add unit transform of DSF to more established unit systems, e.g. Hartree or other atomic units. Be aware of the vacuum permittivity, which is 1 in natural units, but $1/4\pi$ in most other used unit systems.
Description
Add unit transform of DSF to more established unit systems, e.g. Hartree or other atomic units.
Be aware of the vacuum permittivity, which is 1 in natural units, but$1/4\pi$ in most other used unit systems.