1. Generalized Inverses: Theory and Applications;Ben-Israel,2003
2. Matrix Mathematics. Theory, Facts, and Formulas with Application to Linear Systems Theory;Bernstein,2005
3. Sturmian and spectral theory for discrete symplectic systems;Bohner;Trans. Amer. Math. Soc.,2009
4. Generalized Inverses of Linear Transformations;Campbell,2009
5. Disconjugacy;Coppel,1971