Journal article (2015) - P.J. de Visser (author), S.J.C. Yates (author), T Guruswamy (author), DJ Goldie (author), S Withington (author), A. Neto (author), Nuria Llombart (author), AM Baryshev (author), T.M. Klapwijk (author), J.J.A. Baselmans (author)