@inbook{charmmff,
    Author = {MacKerel Jr., A.D. and Brooks III, C.L. and Nilsson, L. and Roux, B. and Won, Y. and Karplus, M.},
    Date-Modified = {2008-09-17 12:39:46 -0400},
    Pages = {271-277},
    Publisher = {John Wiley \& Sons: Chichester},
    Series = {The Encyclopedia of Computational Chemistry},
    Title = {CHARMM: The Energy Function and Its Parameterization with an Overview of the Program},
    Volume = {1},
    Year = {1998}}