@article{VMUMM_2002_2_a10,
     author = {O. D. Frolkina},
     title = {Affinity of angle-preserving mappings},
     journal = {Vestnik Moskovskogo universiteta. Matematika, mehanika},
     pages = {60--63},
     publisher = {mathdoc},
     number = {2},
     year = {2002},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VMUMM_2002_2_a10/}
}