@article{VTGU_2013_3_a3,
     author = {S. A. Copanev},
     title = {A note on the curvature of the level line under the conformal mapping},
     journal = {Vestnik Tomskogo gosudarstvennogo universiteta. Matematika i mehanika},
     pages = {34--36},
     publisher = {mathdoc},
     number = {3},
     year = {2013},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VTGU_2013_3_a3/}
}