Exploring the applicability of density functional tight binding to transition metal ions. Parameterization for nickel with the spin-polarized DFTB3 model. - Milena Vujovic; Mioy Huynh; Sebastian Steiner; Pablo García-Fernández; Marcus Elstner; Qiang Cui 003; Maja Gruden (J. Comput. Chem., 2019)