@article{DM_2014_26_1_a9,
     author = {L. N. Romakina},
     title = {Carpets on simple $4$-contours on the hyperbolic plane of positive curvature},
     journal = {Diskretnaya Matematika},
     pages = {118--132},
     publisher = {mathdoc},
     volume = {26},
     number = {1},
     year = {2014},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DM_2014_26_1_a9/}
}