1. Moore, EH: On the reciprocal of the general algebraic matrix. Bull. Am. Math. Soc. 26, 394-395 (1920)
2. Penrose, R: A generalized inverse for matrices. Proc. Camb. Philos. Soc. 51, 406-413 (1955)
3. Ben-Israel, A, Greville, TNE: Generalized Inverses: Theory and Applications, 2nd edn. Springer, New York (2003)
4. Campbell, SL, Meyer, CD Jr.: Generalized Inverses of Linear Transformations. Corrected reprint of the 1979 original. Dover, New York (1991)
5. Rao, CR, Mitra, SK: Generalized Inverse of Matrices and Its Applications. Wiley, New York (1971)