Kazuyuki Iwamoto Heizo Tokutaka Kazuhiro Yoshihara Kikuo Fujimura Toru Watanabe Satoru Kishida Application of SOM to Quantitative Chemical Data Analysis. 1122-1125 1998 conf/iconip/1998 ICONIP db/conf/iconip/iconip1998.html#IwamotoTYFWK98