@article{PérezyPérez:166030,
      author        = "Pérez y Pérez, L. and Egea, P. and de-Magistris, T.",
      title         = "{When agrarian multifunctionality matters: identifying
                       heterogeneity in societal preferences for externalities of
                       marginal olive groves in Aragon, Spain}",
      year          = "2019",
}