Hiroshi Ueno Seiji Ishikawa Yoshinori Otsuka Kiyoshi Kato Automatic Spinal Deformity Detection by Two Characteristic Axes. 47-50 1996 MVA http://b2.cvl.iis.u-tokyo.ac.jp/mva/proceedings/CommemorativeDVD/1996/papers/1996047.pdf conf/mva/1996 db/conf/mva/mva1996.html#UenoIOK96