Half-projected Hartree-Fock model applications

An Application of the Half-Projected Hartree-Fock Model to the Direct Determination of the Lowest Singlet and Triplet Excited States of Molecular Systems... 

An application of the half-projected Hartree-Fock model to the direct... 

Finally, the applications of the Half-Projected-Hartree-Fock model have not to be limited to the excitations of the valence electron shell. This model can also be used to study core electron excitations. This aspect is especially interesting, since there are very few efficient methods for such calculations in molecular systems [29,30). 

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