1. Characteristics of the aeropollen dynamics at several localities in Spain;Belmonte;Grana,1991
2. Flora dels Països Catalans;Bolós,1990
3. Demographics of a wild boar Sus scrofa Linnaeus, 1758 population in a metropolitan park in Barcelona;Cahill;Galemys,2004
4. An increase in canopy cover leads to masting in Quercus ilex;Camarero;Trees,2010
5. Fotos aéreas del vuelo Americano 1956 – 1957 por Cap. Smith;CECAF (Centro Cartográfico y Fotográfico del Ejército del Aire),1956