%0 Journal Article %A V. A. Klyachin %A E. A. Pabat %T The $C^1$-approximation of the level surfaces of functions defined on irregular meshes %J Sibirskij žurnal industrialʹnoj matematiki %D 2010 %P 69-78 %V 13 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/SJIM_2010_13_2_a6/ %G ru %F SJIM_2010_13_2_a6