Cuff, A.I. and Redfern, O.C. and Greene, L. and Sillitoe, I. and Lewis, T.E. and Dibley, M. and Reid, A. and Pearl, F.G.M. and Dallman, T. and Todd, A. and Garratt, R. and Thornton, Janet M. and Orengo, C.A. (2009) The CATH hierarchy revisited - structural divergence in domain superfamilies and the continuity of fold space. Structure 17 (8), pp. 1051-1062. ISSN 0969-2126.