1. A. M. Il’in, A. S. Kalashnikov, and O. A. Oleinik, “Linear second order equations of parabolic type” [in Russian], Usp. Mat. Nauk 17, No. 3, 3-146 (1962).
2. A. K. Gushchin, “On speed of stabilization of the solution of a boundary value problem for a parabolic equation” [in Russian], Sib. Math. Zh. 10, No 1, 43–57 (1969); English transl.: Sib. Math. J. 10, 30–40 (1969).
3. A. K. Gushchin, “The rate of stabilization of a solution of a parabolic equation in an unbounded region” [in Russian], Differ. Uravn. 6, No. 4, 741–761 (1970).
4. V. G. Ushakov, “The behavior for t→∞of solutions of the third mixed problem for second order parabolic equations” [in Russian], Differ. Uravn. 15, No. 2, 310–320 (1979); English transl.: Differ. Equations 15, 212–219 (1979).
5. Yu. N. Cheremnykh, “The behavior of solutions of boundary value problems for second order parabolic equations as t grows without bound” [in Russian], Mat. Sb. 75, No. 2, 241–253 (1968); English transl.: Math. USSR, Sb. 4, 219–232 (1969).