@misc{indiciae6cb0498c04cd, title = {A practical valence bond method: a configuration interaction method approach with perturbation theoretic facility.}, author = {Lingchun Song and Wei Wu and Qianer Zhang and Sason Shaik}, year = {2004}, doi = {10.1002/jcc.10382}, url = {https://pubmed.ncbi.nlm.nih.gov/14735567/}, note = {Source identifier: 14735567} }