Moment equations for a spatially extended system of two competing species D. Valenti, L. Schimansky-Geier, X. Sailer and B. Spagnolo Eur. Phys. J. B, 50 1-2 (2006) 199-203 Published online: 12 April 2006 DOI: 10.1140/epjb/e2006-00102-5