@article{SJIM_2010_13_2_a6,
     author = {V. A. Klyachin and E. A. Pabat},
     title = {The $C^1$-approximation of the level surfaces of functions defined on irregular meshes},
     journal = {Sibirskij \v{z}urnal industrialʹnoj matematiki},
     pages = {69--78},
     publisher = {mathdoc},
     volume = {13},
     number = {2},
     year = {2010},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/SJIM_2010_13_2_a6/}
}