@article{10_4064_sm157_1_6,
     author = {Zhiguo Chen},
     title = {Geometric characterization for affine
 mappings and {Teichm\"uller} mappings},
     journal = {Studia Mathematica},
     pages = {71--82},
     publisher = {mathdoc},
     volume = {157},
     number = {1},
     year = {2003},
     doi = {10.4064/sm157-1-6},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/sm157-1-6/}
}