1. A. N. Tikhonov, ?Uniqueness theorems for the heat equation?, Mat. Sb.,42 No. 2, 199?216 (1935).
2. I. I. Shmulev, ?Bounded solutions of boundary problems without initial conditions for parabolic equations and inverse boundary problems?, Dokl. Akad. Nauk SSSR,142, No. 1, 46?49 (1962).
3. I. I. Shmulev, ?Periodic and almost periodic solutions of the oblique derivative problem for parabolic equations?, Diff. Urav.,5, No. 12, 2225?2236 (1969).
4. O. A. Oleinik and E. V. Radkevich, ?Behavior of solutions of general parabolic systems of differential equations in unbounded domains?, Dokl. Akad. Nauk SSSR,220, No. 5, 1027?1030 (1975).
5. O. A. Oleinik, ?Behavior of solutions of linear parabolic systems of differential equations in unbounded domains?, Usp. Mat. Nauk,30, No. 2, 219?220 (1975).