%0 Journal Article %A M. E. Lerner %T Maximum and uniqueness principles for the solutions of boundary value problems of certain equations of mixed type %J Izvestiâ vysših učebnyh zavedenij. Matematika %D 1977 %P 71-83 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/IVM_1977_2_a9/ %G ru %F IVM_1977_2_a9