Hayden Oliver, Björk Mikael T, Schmid Heinz, Riel Heike, Drechsler Ute, Karg Siegfried F, Lörtscher Emanuel, Riess Walter
IBM Research GmbH, Zurich Research Laboratory, Rüschlikon, Switzerland.
Small. 2007 Feb;3(2):230-4. doi: 10.1002/smll.200600325.