TY - JOUR AU - A. V. Boltachev TI - On ellipticity of operators with shear mappings JO - Contemporary Mathematics. Fundamental Directions PY - 2023 SP - 565 EP - 577 VL - 69 IS - 4 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/CMFD_2023_69_4_a0/ LA - ru ID - CMFD_2023_69_4_a0 ER -