Calculation of clustered eigenvalues of large matrices using variance minimization method.

Emili Besalú Josep Maria Bofill Calculation of clustered eigenvalues of large matrices using variance minimization method. 1777-1785 1998 19 Journal of Computational Chemistry 15 http://dx.doi.org/10.1002/(SICI)1096-987X(19981130)19:15<1777::AID-JCC9>3.0.CO;2-K db/journals/jcc/jcc19.html#BesaluB98