|    [1]Barbu V. Optimal Control of Variational Inequalities. London, Boston: Pitman Research Notes in Math-ematics, 1984 
 [2]Barbu V. Analysis and Control of Nonlinear Infinite Dimensional Systems. New York: Academic Press,1993 
 [3]Adams D R, Lenhart S M, Yong J. Optimal control of the obstacle for an elliptic variational inequality.Appl Math Optim, 1998,38: 121-140 
 [4]Deng Y, Wang G. Necessary conditions for optimal control problems governed by some nonlinear parabolic differential equations. Panamerican Math J, 1998,8(4): 67-80 
 [5]Li X, Yong J. Optimal Control Theory for Infinite Dimensional System. Birkhaus Boston, 1995 
 [6]Li X, Yong J. Necessary conditions of optimal control for distributed parameter system. SIAM J Control Optim, 1991, 29: 895-908 
 [7]Wang G, Chen S. Maximum Principle for optimal control of some parabolic systems with two point boundary conditions. Numer Funct Anal and Optimiz, 1999,20(1/2): 163-174 
 [8]Chen Q. Indirect obstacle control problem for semilinear elliptic variational inequalities. SIAM J Control Optim, 2000,38:138-158
  |