@article{SM_2012_203_12_a2,
     author = {A. B. Bogatyrev},
     title = {Conformal mapping of rectangular heptagons},
     journal = {Sbornik. Mathematics},
     pages = {1715--1735},
     publisher = {mathdoc},
     volume = {203},
     number = {12},
     year = {2012},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_2012_203_12_a2/}
}