1. Regression and the Moore-Penrose Pseudo-inverse;Albert,1972
2. Generalized Inverses: Theory and Applications;Ben-Israel,1974
3. On the algebra of networks;Bott;Trans. Amer. Math. Soc.,1953
4. Generalized Inverses of Linear Transformations;Campbell,1979
5. The geometry of generalized inverses;Kruskal;J. Roy. Statist. Soc. Ser. B,1975