Kirschner, K N; Lewin, A H; Bowen, J P (2003) Molecular mechanics force-field development for amino acid zwitterions. J Comput Chem 24:111-28 |
Sorensen, J B; Lewin, A H; Bowen, J P (2001) Ab initio and molecular mechanics (MM3) calculations of protonated-neutral diamine hydrogen bonds. J Org Chem 66:4105-14 |