Ali Lari-Lavassani Xun Li Dynamic Mean Semi-variance Portfolio Selection. 95-104 2003 conf/iccS/2003-1 International Conference on Computational Science http://link.springer.de/link/service/series/0558/bibs/2657/26570095.htm db/conf/iccS/iccS2003-1.html#Lari-LavassaniL03