Extended source model for diffusive coupling - Extended source model for diffusive coupling Héctor O. González-Ochoa, Roberto Flores-Moreno, Luz M. Reyes and Ricardo Femat Eur. Phys. J. E, 39 1 (2016) 4 Published online: 26 January 2016 DOI: 10.1140/epje/i2016-16004-y