A.Rusanov, V., A. V.Lakeyev, A. V.Daneev, and Y. É.Linke. “SEMIADDITIVITY OF THE ENTROPY RAYLEIGH-RITZ OPERATOR IN THE PROBLEM OF REALIZATION OF AN INVARIANT POLYLINEAR REGULATOR OF A NON-STATIONARY HYPERBOLIC SYSTEM”. Advances in Differential Equations and Control Processes, Vol. 27, Jan. 2025, https://ojs.acad-pub.com/index.php/ADECP/article/view/2557.