Several observations on Toeplitz and Hankel circulants
Kh. D. Ikramov, V. N. Chugunov

References
1.	E. Bozzo, “Algebras of higher dimension for displacement decompositions and computation with Toeplitz plus Hankel matrices”, Linear Algebra Appl., 230 (1995), 120–150
2.	V. V. Voevodin, E. E. Tyrtyshnikov, Vychislitelnye protsessy s teplitsevymi matritsami, Nauka, M., 1987