A sharp transition between a trivial 1D BTW model and self-organized critical rice-pile modelM. Bengrine, A. Benyoussef, A. El Kenz, M. Loulidi and F. MhirechEur. Phys. J. B, 12 1 (1999) 129-133DOI: https://doi.org/10.1007/s100510050987