Eichkorn95

K. Eichkorn, O. Treutler, H. Ohm, M. Haser, and R. Ahlrichs, “Auxiliary basis-sets to approximate Coulomb potentials,” Chem. Phys. Lett., 240 (1995) 283-89. DOI: 10.1016/0009-2614(95)00621-A