Generic theory of active polar gels: a paradigm for cytoskeletal dynamics K. Kruse, J. F. Joanny, F. Jülicher, J. Prost and K. Sekimoto Eur. Phys. J. E, 16 1 (2005) 5-16 Published online: 31 January 2005 DOI: 10.1140/epje/e2005-00002-5