1. Nevanlinna–Pick interpolation: Generalizations and applications;Ball,1988
2. Nevanlinna–Pick interpolation for time varying input–output maps: The discrete time case;Ball,1992
3. The band method and Grassmannian approach for completion and extension problems;Ball,1996
4. A Beurling–Lax theorem for the Lie group U(m,n) which contains most classical interpolation;Ball;J. Operator Theory,1983
5. J.A. Ball, K.M. Mikkola, A.J. Sasane, State-space formulas for the Nehari–Takagi problem for nonexponentially stable infinite-dimensional systems, SIAM J. Control Optim. (2004), in press