@article{Efremova:70305,
      author        = "Efremova, L.S. and Gracio, M.C. and Lopez-Ruiz, R. and
                       Sakbaev, V.Zh. and Stepin, A.M.",
      title         = "{European Workshop "nonlinear Maps and Applications" -
                       2017, Nizhni Novgorod, Russia}",
      year          = "2018",
}