@article{salwen_sheets_cotanch_2004, title={BCS and attractive Hubbard model comparative study}, volume={70}, DOI={10.1103/physrevb.70.064511}, number={6}, journal={Physical Review. B, Condensed Matter and Materials Physics}, author={Salwen, N. and Sheets, S. A. and Cotanch, S. R.}, year={2004} }