Mechanics and remodelling of cell packings in epithelia D. B. Staple, R. Farhadifar, J. -C. Röper, B. Aigouy, S. Eaton and F. Jülicher Eur. Phys. J. E, 33 2 (2010) 117-127 Published online: 17 November 2010 DOI: 10.1140/epje/i2010-10677-0