TY - JOUR AU - V. A. Klyachin AU - E. A. Pabat TI - The $C^1$-approximation of the level surfaces of functions defined on irregular meshes JO - Sibirskij žurnal industrialʹnoj matematiki PY - 2010 SP - 69 EP - 78 VL - 13 IS - 2 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/SJIM_2010_13_2_a6/ LA - ru ID - SJIM_2010_13_2_a6 ER -