1. V. N. Kublanovskaya, ?On the calculation of the generalized inverse of a matrix and projector,? Zh. Vychis, Mat. i Mat. Fiziki,6, No. 2, 326?332 (1966).
2. D. K. Faddeev and V. N. Faddeeva, Computational Methods of Linear Algebra, 2nd revised ed. [in Russian], Fizmatgiz, Moscow-Leningrad (1963).