%0 Journal Article %A M. I. Chudakov %T Secondary aromatic polynuclear structure of lignin %J Doklady Akademii Nauk %D 1961 %P 1389-1392 %V 137 %N 6 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1961_137_6_a35/ %G ru %F DAN_1961_137_6_a35