@article{MAN_1989__284_4_164547,
     author = {Mika Sepp\"al\"a and Tuomas Sorvali},
     title = {Affine coordinates for {Teichm\"uller} spaces.},
     journal = {Mathematische Annalen},
     pages = {165--176},
     publisher = {mathdoc},
     volume = {284},
     number = {4},
     year = {1989},
     zbl = {0649.32018},
     url = {http://geodesic.mathdoc.fr/item/MAN_1989__284_4_164547/}
}