%0 Journal Article %A M. N. Kogan %T Vortex and circulation conservation in magnetohydrodynamics %J Doklady Akademii Nauk %D 1961 %P 58-59 %V 139 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1961_139_1_a14/ %G ru %F DAN_1961_139_1_a14