Journal article (2015) - S Velez (author), D Ciudad (author), LE Hueso (author), J.O. Island (author), M. Buscema (author), O Txoperena (author), S Parui (author), G.A. Steele (author), G.A. Steele (author), F Casanova (author), H.S.J. van der Zant (author), A. Castellanos Gomez (author)