E. L. Zhukovskii U.S.S.R. Comput. Math. Math. Phys. , vol.17 No.4 , 01.1978 , p. 3-16, language: английский ISSN 0041-5553  Ключевые слова overdetermined systems, method of least squares, degenerate and ill-posed problems, systems of linear algebraic equations