Germán Creamer Portfolio Optimization and Corporate Networks: Extending the Black Litterman Model. 83-94 2012 Complex https://doi.org/10.1007/978-3-319-03473-7_8 http://eudl.eu/doi/10.1007/978-3-319-03473-7_8 conf/complex/2012 db/conf/complex/complex2012.html#Creamer12