@article{MT_2014_17_2_a9,
     author = {L. N. Romakina},
     title = {On the area of a~trihedral on a~hyperbolic plane of positive curvature},
     journal = {Matemati\v{c}eskie trudy},
     pages = {184--206},
     publisher = {mathdoc},
     volume = {17},
     number = {2},
     year = {2014},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MT_2014_17_2_a9/}
}