Barnett, M. P.; Capitani, J. F. (2006). "Modular chemical geometry and symbolic calculation". International Journal of Quantum Chemistry. 106 (1): 215–227. Bibcode:2006IJQC..106..215B. doi:10.1002/qua.20807.
Barnett, M. P.; Capitani, J. F. (2006). "Modular chemical geometry and symbolic calculation". International Journal of Quantum Chemistry. 106 (1): 215–227. Bibcode:2006IJQC..106..215B. doi:10.1002/qua.20807.