B. G. Johnson and M. J. Frisch, “Analytic second derivatives of the gradient-corrected density functional energy: Effect of quadrature weight derivatives,” Chem. Phys. Lett., 216 (1993) 133-40. DOI: 10.1016/0009-2614(93)E1238-C
B. G. Johnson and M. J. Frisch, “Analytic second derivatives of the gradient-corrected density functional energy: Effect of quadrature weight derivatives,” Chem. Phys. Lett., 216 (1993) 133-40. DOI: 10.1016/0009-2614(93)E1238-C
