TY - JOUR AU - È. Ya. Gren AU - G. Ya. Vanag TI - On the deep colour of the anionic forms of cyclopentene-4-diones-1,3 and indandiones-1,3 JO - Doklady Akademii Nauk PY - 1965 SP - 824 EP - 826 VL - 165 IS - 4 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DAN_1965_165_4_a24/ LA - ru ID - DAN_1965_165_4_a24 ER -