@article{FPM_2013_18_6_a12,
     author = {G. B. Shabat},
     title = {Unicellular four-edged toric dessins},
     journal = {Fundamentalʹna\^a i prikladna\^a matematika},
     pages = {209--222},
     publisher = {mathdoc},
     volume = {18},
     number = {6},
     year = {2013},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/FPM_2013_18_6_a12/}
}