Foam front propagation in anisotropic oil reservoirs P. Grassia, C. Torres-Ulloa, S. Berres, E. Mas-Hernández and N. Shokri Eur. Phys. J. E, 39 4 (2016) 42 Published online: 20 April 2016 DOI: 10.1140/epje/i2016-16042-5