various authors. OctoNus, Moscow State University, Bruce Harding, and others have posted work there. Holloway, Garry (2000-2004). HCA: defining ideal cut diamonds is a detailed explanation of the "Holloway Cut Adviser". A web service that uses this software is available. Blodgett, Troy; et al. (GIA) (2006) "Painting and Digging Out", GIA article 2006. Ware, J. W. (1936). New Diamond Cuts Break More Easily, pp. 4. Gemological Institute of America, USA, Vol. 2, No. 4 (Winter 1936) Diamond Gemstone cutting