Stick-slip instability for viscous fingering in a gel N. Puff, G. Debrégeas, J.-M. di Meglio, D. Higgins, D. Bonn and C. Wagner Europhys. Lett., 58 4 (2002) 524-529 Published online: 01 May 2002 DOI: 10.1209/epl/i2002-00427-7