@article{TM_2017_297_a14,
     author = {Mark Pollicott},
     title = {A note on the shrinking sector problem for surfaces of variable negative curvature},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     pages = {281--291},
     publisher = {mathdoc},
     volume = {297},
     year = {2017},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TM_2017_297_a14/}
}