[1] BAHAA G. M.: Quadratic Pareto optimal control of parabolic equation with state-control constraints and an infinite number of variables. IMA J. Math. Control Infoгm. 20 (2003), 167-178. MR 1987533 | Zbl 1029.49023

[2] BEREZANSKII, JU. M.: Self-Adjoint Operators in Spaces of Functions of Infinitely Many Variables. Transl. Math. Monographs 63, Amer. Math. Soc, Providence, RI, 1986.

[3] BEREZANSKII, JU. M.: Self-adjointness of elliptic operator with an infinite number of variables. Ukrain. Mat. Zh. 27 (1975), 729-742. MR 0405094

[4] EL-SAIFY H. A.: Boundary control for the hyperbolic operator with an infinite number of variables. J. Inst. Math. Comput. Sci. Comput. Sci. Ser. 1 (1990), 47-51.

[5] EL-SAIFY H. A.: Boundary control problem with an infinite number of variables. Internal J. Math. Math. Sci. 28 (2001), 57-62. MR 1882683 | Zbl 0999.49003

[6] EL-SAIFY H. A.-BAHAA G. M.: Optimal control for nxn systems of hyperbolic types. Rev. Mat. Apl. 22 (2001), 41-58. MR 1890942

[7] EL-SAIFY H. A.-SERAG H. M.-BAHAA G. M.: On optimal control for nxn elliptic system involving operators with an infinite number of variables. A.M.S.E. Advances in Modeling & Analysis 1-A 37 (2000), 47-61.

[8] GALI I. M.-EL-SAIFY H. A.: Optimal control of a system governed by hyperbolic operator with an infinite number of variables. J. Math. Anal. Appl. 85 (1982), 24-30. MR 0647556 | Zbl 0563.49013

[9] GALI I. M.-EL-SAIFY H. A.: Distributed control of a system governed by Dirichlet and Neumann Problems for a self-adjoint elliptic operator with an infinite number of variables. J. Optim. Theory Appl. 39 (1983), 293-298. MR 0693688 | Zbl 0481.49015

[10] IMANUVILOV O. YU.: On exact controllability for the Navier-Stokes equations. ESAIM: Control. Optim. Calc. Var. 3 (1998), 97-131. MR 1617825 | Zbl 1052.93502

[11] KOTARSKI W.: Optimal control of a system governed by Petrowsky type equation with an infinite number of variables. Acta Univ. Palack. Olomuc. Fac. Rerum Natur. Math. 35 (1996), 73-82. MR 1485046 | Zbl 0961.49011

[12] KOTARSKI W.-EL-SAIFY H. A.-BAHAA G. M.: Optimal control of parabolic equation with an infinite number of variables for non-standard functional and time delay. IMA J. Math. Control Inform. 19 (2002), 461-476. MR 1949014 | Zbl 1044.49018

[13] KOTARSKI W.-EL-SAIFY H. A.-BAHAA G. M.: Optimal control problem for a hyperbolic system with mixed control-state constraints involving operator of infinite order. Internat. J. Pure Appl. Math. 1 (2002), 241-254. MR 1912680 | Zbl 1009.49021

[14] LI X.-YONG J.: Optimal Control Theory for Infinite Dimensional Systems. Birkhauser, Boston, 1995. MR 1312364

[15] LIONS J. L.: Optimal Control of Systems Governed by Partial Differential Equations. Grundlehren Math. Wiss. 170, Springer-Verlag, Berlin-Heidelberg-New York, 1971. MR 0271512 | Zbl 0203.09001

[16] LIONS J. L.-ENRIQUE Z.: Approximate controllability of a hydro-elastic coupled system. ESAIM: Control. Optim. Calc. Var. 1 (1995), 1-15. MR 1382513 | Zbl 0878.93034

[17] LIONS J. L.-MAGENES E.: Non-Homogeneous Boundary Value Problem and Applications. Vol. I. Grundlehren Math. Wiss. 181, Springer-Verlag, Berlin-Heidelberg-New York, 1972. MR 0350177