1. V. A. Artamonov, “Structure of Hopf algebras,” in: Itogi Nauki i Tekhniki. Algebra, geometry, topology [in Russian], VINITI publ. (1991), 29, 3–63.
2. Ju. A. Bakhturin, Basic Structures of Modern Algebra [in Russian], Nauka, Moscow (1990).
3. V. L. Kurakin, “Convolution of linear recurring sequences,” Russian Math. Surveys, 48, No.4, 249–250 (1993).
4. V. L. Kurakin, “Structure of the Hopf algebras of linear recurring sequences,” Russian Math. Surveys, 48, No.5 (1993).
5. V. L. Kurakin, “Hopf algebras of linear recurring sequences over commutative rings,” in: Proceedings of 2 Math. Conf. of Moscow State Social Univ., Nahabino, 1994 pp. 67–69.