TY - JOUR AU - È. A. Vitrichenko AU - N. I. Shamarin TI - Investigation of second parabolic $6$ meter-mirror in the shop conditions JO - Doklady Akademii Nauk PY - 1980 SP - 62 EP - 66 VL - 255 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DAN_1980_255_1_a14/ LA - ru ID - DAN_1980_255_1_a14 ER -