1. Discrete Hamiltonian Systems: Difference Equations, Continued Fractions, and Riccati Equations;Ahlbrandt,1996
2. Generalized Inverses: Theory and Applications;Ben-Israel,2003
3. Matrix Mathematics. Theory, Facts, and Formulas with Application to Linear Systems Theory;Bernstein,2005
4. Linear Hamiltonian difference systems: disconjugacy and Jacobi-type conditions;Bohner;J. Math. Anal. Appl.,1996
5. Discrete linear Hamiltonian eigenvalue problems;Bohner;Comput. Math. Appl.,1998