@article{ukr, author = {Peter Meinicke and Stefan Klanke and Roland Memisevic and Helge Ritter}, title = {Principal Surfaces from Unsupervised Kernel Regression}, journal = {IEEE Transactions on Pattern Analysis and Machine Intelligence}, volume = {27}, number = {9}, year = {2005}, pages = {1379--1391}, publisher = {IEEE Computer Society}, address = {Washington, DC, USA}, }