Yoshitatsu Matsuda Kazunori Yamaguchi Linear Multilayer Independent Component Analysis Using Stochastic Gradient Algorithm. 303-310 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=3195&spage=303 2004 conf/ica/2004 ICA db/conf/ica/ica2004.html#MatsudaY04