Journal article (2007) - STB Goennenwein (author), SW Schink (author), C Bihler (author), MS Brandt (author), A Brandlmaier (author), A Boger (author), M Opel (author), R Gross (author), RS Keizer (author), T.M. Klapwijk (author), T. M. Klapwijk (author), A. Gupta (author), H Huebl (author)