Variance vs downside risk: Is there really that much difference? - Henk Grootveld; Winfried Hallerbach (Eur. J. Oper. Res., 1999)

A framework for managing a portfolio of socially responsible investments. - Winfried Hallerbach; Haikun Ning; Aloy Soppe; Jaap Spronk (Eur. J. Oper. Res., 2004)