@article{FPM_2013_18_6_a6,
     author = {M. A. Deryagina and A. D. Mednykh},
     title = {On the {Belyi} functions of planar circular maps},
     journal = {Fundamentalʹna\^a i prikladna\^a matematika},
     pages = {111--133},
     publisher = {mathdoc},
     volume = {18},
     number = {6},
     year = {2013},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/FPM_2013_18_6_a6/}
}