@article{SEMR_2020_17_a141,
     author = {M. V. Tryamkin},
     title = {The modulus of a family of curves on an abstract surface over a spherical ring},
     journal = {Sibirskie \`elektronnye matemati\v{c}eskie izvesti\^a},
     pages = {1816--1822},
     publisher = {mathdoc},
     volume = {17},
     year = {2020},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SEMR_2020_17_a141/}
}