@article {1990|1894, title = {A VIBRATIONAL MOLECULAR-FORCE FIELD OF MODEL COMPOUNDS WITH BIOLOGICAL INTEREST .1. HARMONIC DYNAMICS OF CRYSTALLINE UREA AT 123-K}, journal = {J. Comput. Chem.}, volume = {11}, number = {5}, year = {1990}, month = {jun}, pages = {560{\textendash}568}, doi = {10.1002/jcc.540110504}, author = {Philippe Derreumaux and VERGOTEN, G and LAGANT, P} }