1. Singular Systems of Differential Equations I;Campbell,1980
2. Differential-Algebraic Equations. Analysis and Numerical Solution;Kunkel,2006
3. Differential-Algebraic Systems. Analytical Aspects and Circuit Applications;Riaza,2008
4. Structural properties of linear dynamical systems;Rosenbrock;Internat. J. Control,1974
5. Sobolev Spaces;Adams,1975