@book{Backhaus2006,
author = {Backhaus, K. and Erichson, B. and Plinke, W. and Weiber, R.},
title= {Multivariate Analysemethoden. Eine anwendungsorientierte Einführung},
year = {2006},
address = {Berlin, Heidelberg, New York},
publisher = {Springer},
}