@article{CMH_1985__60_139997,
     author = {Steven P. Kerckhoff},
     title = {Earthquakes are analytic.},
     journal = {Commentarii mathematici Helvetici},
     pages = {17--30},
     year = {1985},
     volume = {60},
     zbl = {0575.32024},
     url = {http://geodesic.mathdoc.fr/item/CMH_1985__60_139997/}
}