1. Differentiable families of subspaces;Ferrer;Linear Algebra Appl.,1994
2. Similarity of non-everywhere defined linear maps;Ferrer;Linear Algebra Appl.,1992
3. Global block-similarity and pole assignment od class Cp;Ferrer;SIAM J. Matrix Appl.,1998
4. Canonical forms, general results, feedback equivalence and Kronecker indices;Gohberg,1980
5. R.E. Kalman, Kronecker invariants and feedback, in: Proceedings of the Conference on Ordinary Differential Equations, Mathematical Research Center, Naval Research Lab, 1971