Serrano, E., Calabuig, G., Casinello, J., & Pérez, J. M. (2002). The human dimension that favours the unnatural expansion of an exotic ungulate (Ammotragus lervia) throughout the Iberian Peninsula. Pirineos, 157, 181–190. https://doi.org/10.3989/pirineos.2002.v157.70