R.E.D. Server: a web service for deriving RESP and ESP charges and building force field libraries for new molecules and molecular fragments. - Enguerran Vanquelef; Sabrina Simon; Gaelle Marquant; Elodie Garcia; Geoffroy Klimerak; Jean Charles Delepine; Piotr Cieplak; François-Yves Dupradeau (Nucleic Acids Res., 2011)