TY - JOUR AU - E. A. Kolesnikova TI - Subelliptic estimates for a problem with directional derivative in $L^p$ JO - Vestnik Moskovskogo universiteta. Matematika, mehanika PY - 1984 SP - 87 EP - 89 IS - 4 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/VMUMM_1984_4_a23/ LA - ru ID - VMUMM_1984_4_a23 ER -