TY - JOUR AU - A. R. Alimov TI - Preservation of approximative properties of Chebyshev sets and suns in a plane JO - Vestnik Moskovskogo universiteta. Matematika, mehanika PY - 2008 SP - 46 EP - 49 IS - 5 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/VMUMM_2008_5_a7/ LA - ru ID - VMUMM_2008_5_a7 ER -