@article{VTGU_2013_6_a6,
     author = {M. S. Bukhtyak and A. V. Nikul'chikov},
     title = {Fields on surfaces that are in a~point correspondence},
     journal = {Vestnik Tomskogo gosudarstvennogo universiteta. Matematika i mehanika},
     pages = {56--69},
     year = {2013},
     number = {6},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VTGU_2013_6_a6/}
}