Patón D, Núñez-Trujillo J, Díaz MA, Muñoz A . 1999 .
Assessment of browsing biomass, nutritive value and carrying capacity of shrublands for red deer (Cervus elaphus L.) management in Monfrague Natural Park (SW Spain)
Journal of Arid Environments
Rolando A, Laiolo P, Formica M . 1997 .
A comparative analysis of the foraging behaviour of the Chough Pyrrhocorax pyrrhocorax and the Alpine Chough Pyrrhocorax graculus coexisting in the Alps