Jülicher, F. Max Planck Institute for the Physics of Complex Systems, Max Planck Society;
https://www.nature.com/articles/nphys3224 (Publisher version)
Prost, J., Jülicher, F., & Joanny, J. F. (2015). Active gel physics. Nature Physics, 11(2), 111-117. doi:10.1038/NPHYS3224.