J. S. A. Hepburn

The Semistable-Center-Unstable Manifold near a Critical Element*

W. M. Wonham, W. Wonham, J. Hepburn, 1984 .

The Internal Model Principle of Regulator Theory on Differentiable Manifolds

W. M. Wonham, W. Wonham, J. Hepburn, 1981 .