Aggen, James B.; Humphrey, John M.; Gauss, Carla-Maria; Huang, Hsien-Bin; Nairn, Angus C.; Chamberlin, A. Richard Bioorganic and Medicinal Chemistry, 1999, vol. 7, # 3 p. 543 - 564 doi: 10.1016/S0968-0896(98)00254-5