@ARTICLE {7405, author={M. Raydan and S. Rosa and S. Santos}, doi={10.1007/s11075-008-9194-7}, journal={Numerical Algorithms}, title={On the solution of the symmetric eigenvalue complementarity problem by the spectral projected gradient algorithm}, year={2008}, month={April}, volume={47}, number={4}, pages={391-407}, ISSN={1017-1398} }