@article{Cozzo:56094,
      author        = "Cozzo, E. and Kivelä, M. and Domenico, M.D. and
                       Solé-Ribalta, A. and Arenas, A. and Gómez, S. and Porter,
                       M.A. and Moreno, Y.",
      title         = "{Structure of triadic relations in multiplex networks}",
      year          = "2015",
}