Journal article (2013) - A. Endo (author) , C Sfiligoj (author) , Stephen J.C. Yates (author) , JJA Baselmans (author) , D. J. Thoen (author) , S.M.H. Javadzadeh (author) , PP van der werf (author) , AM Baryshev (author) , T.M. Klapwijk (author)