Pandit, Suhas Max Planck Institute for Mathematics, Max Planck Society;
https://doi.org/10.1007/s10711-011-9629-5 (Publisher version)
Gadgil, S., & Pandit, S. (2012). Geosphere laminations in free groups. Geometriae Dedicata, 158, 211-234. doi:10.1007/s10711-011-9629-5.