1996
R. Rothfuss, J. Rudolph, and M. Zeitz, Flatness Based Control of a Nonlinear Chemical Reactor Model, Automatica, 32:1433-1439, 1996.
J. Rudolph, Duality in Time-Varying Linear Systems: A Module Theoretic Approach, Linear Algebra and its Applications, 245:83-106, 1996.