Calama, R., Madrigal, G., Candela, J. A. and Montero, G. (2007) “Effects of fertilization on the production of an edible forest fruit: stone pine (Pinus pinea L.) nuts in south-west Andalusia”, Forest Systems, 16(3), pp. 241-252. doi: 10.5424/srf/2007163-01013.