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            Peter Kogut,
            Olha Kupenko,
        
        Approximation Methods in Optimization of Nonlinear Systems
 De Gruyter , Walter de Gruyter GmbH, Berlin, Boston, Series in Nonlinear Analysis and Applications 32 (2019) 351p. doi: 10.1515/9783110668520
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            P. I. Kogut,
            G. Leugering,
        
        Optimal Control Problems for Partial Differential Equations on Reticulated Domains: Approximation and Asymptotic Analysis
 Birkhäuser, Boston (2011) 636p. doi: 10.1007/978-0-8176-8149-4
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            E. Casas,
            P.I. Kogut,
            G. Leugering,
        
        Approximation of Optimal Control Problems in the Coefficient for the $p$-Laplace Equation. I. Convergence Result
 SIAM J. on Control and Optimization, 54, no. 3 (2016) 1406-1422 doi: 10.1137/15M1028108
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            G. Buttazzo,
            P. I. Kogut,
        
        Weak optimal controls in coefficients for linear elliptic problems
 Revista Matematica Complutense, 24, no. 1 (2011) 83–94. doi: 10.1007/s13163-010-0030-y
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            U. De Maio,
            P.I. Kogut,
            G. Zecca,
        
        On Optimal $L^1$-Control in Coefficients for Quasi-Linear Dirichlet Elliptic Boundary Value Problem with $BMO$-Anisotropic $p$-Laplacian
 Mathematical Control and Related Fields, 10, no. 4 (2020) 827-854 doi: 10.3934/mcrf.2020021
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