L. V. Fardigola and Y. V. Sheveleva, “On the Possibility of Stabilization of Evolution Systems of Partial Differential Equations on $ℝ^n × [0, + ∞)$Using One-Dimensional Feedback Controls”, Ukr. Mat. Zhurn., vol. 54, no. 9, pp. 1289-1296, Sep. 2002.