1. A. G. Kurosh, Higher Algebra (Fizmatgiz, Moscow, 1963; Mir, Moscow, 1980).
2. R. A. Horn and C. R. Johnson, Matrix Analysis (Cambridge Univ. Press, Cambridge, 1985).
3. M. Vujičić, F. Herbut, and G. Vujičić, SIAM J. Appl. Math. 23, 225–238 (1972).
4. E. P. Wigner, J. Math. Phys. 1, 413–419 (1960).
5. A. George, Kh. D. Ikramov, E. V. Matushkina, and W.-P. Tang, SIAM J. Matrix Anal. Appl. 16, 1107–1126 (1995).