1. Kh. D. Ikramov, Dokl. Math. 81, 8–10 (2010) [Dokl. Akad. Nauk 430, 15–17 (2010)].
2. Kh. D. Ikramov, Mat. Zametki 87(6) (2010) [in press].
3. Kh. D. Ikramov, Comput. Math. Math. Phys. 50, 383–386 (2010) [Zh. Vychisl. Mat. Mat. Fiz. 50, 403–406 (2010)].
4. F. R. Gantmacher, The Theory of Matrices (Chelsea, New York, 1959; Fizmatgiz, Moscow, 1966).
5. D. K. Faddeev and V. N. Faddeeva, Computational Methods of Linear Algebra (Fizmatgiz, Moscow, 1963; Freeman, San Francisco, 1963).