%0 Journal Article %A B. K. Vaǐnshteǐn %A V. F. Dvoryankin %T The mechanism of ferroelectric phase transition in thiourea at $133^\circ$~К %J Doklady Akademii Nauk %D 1961 %P 111-114 %V 140 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1961_140_1_a28/ %G ru %F DAN_1961_140_1_a28