Alvarez-Rodriguez, Unai
Perez-Leija, Armando
Egusquiza, Iñigo L.
Gräfe, Markus
Sanz, Mikel
Lamata, Lucas
Szameit, Alexander
Solano, Enrique
Article History
Received: 12 December 2016
Accepted: 16 January 2017
First Online: 23 February 2017
Competing interests
: The authors declare no competing financial interests.