@article{IVM_2009_6_a7,
     author = {L. A. Aksent'ev and A. N. Akhmetova},
     title = {Mappings connected with the gradient of conformal radius},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {60--64},
     publisher = {mathdoc},
     number = {6},
     year = {2009},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_2009_6_a7/}
}