%0 Journal Article %A V. N. Zakharov %T An absolute extremum principle for a~class of third-order differential equations in three-dimensional space and its application %J Izvestiâ vysših učebnyh zavedenij. Matematika %D 2000 %P 29-32 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/IVM_2000_3_a5/ %G ru %F IVM_2000_3_a5