"K. Kashima,Y. Yamamoto","On standard H_infinity control problems for systems with infinitely many unstable poles",,"Systems and Control Letters",,"Vol. 57 Issue 4",,"pp. 309/314",2008, "K. Kashima,Y. Yamamoto","Finite rank criteria for H_infinity control of infinite-dimensional systems",,"IEEE Transactions on Automatic Control",,"Vol. 53, Issue 4",," 881/893",2008,