Yuji Yoshida Masami Yasuda Jun-ichi Nakagami Masami Kurano A Discrete-Time Portfolio Selection with Uncertainty of Stock Prices. 245-252 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=2715&spage=245 2003 conf/ifsa/2003 IFSA db/conf/ifsa/ifsa2003.html#YoshidaYNK03