@incollection {hader_04_two-stage,
	title = {Two-Stage Classification with Automatic Feature Selection for an Industrial Application},
	year = {2004},
	pages = {137-144},
	publisher = {Springer},
	author = {S. Hader and Fred A. Hamprecht},
	editor = {Weihs, C. and Gaul, W.}
}
@incollection {hader_03_efficient,
	title = {Efficient Density Clustering},
	year = {2003},
	pages = {39-48},
	publisher = {Springer},
	doi = {10.1007/b13634},
	author = {S. Hader and Fred A. Hamprecht},
	editor = {Schader, M. and Gaul, W. and Vichi, M.}
}
