Percolation in real wildfires G. Caldarelli, R. Frondoni, A. Gabrielli, M. Montuori, R. Retzlaff and C. Ricotta Europhys. Lett., 56 4 (2001) 510-516 Published online: 01 December 2003 DOI: 10.1209/epl/i2001-00549-4