1. D. J. Benson, Polynomial Invariants of Finite Groups, Cambridge University Press, Cambridge, 1993.
2. N. Bourbaki, Commutative Algebra, Chap. 1–7, Springer, Berlin, 1989. Russian transl.: Н. Бурбаки, Kommуmamивнaя алгебре, Мир, М., 1971.
3. N. Bourbaki, Groupes et Algèbres de Lie, Chap. IV, V, VI, Herman, Paris, 1968. Russian transl.: Н. Бурбаки, Группы и алгебры Ли, гл. IV, V, VI, Мир, М. 1972.
4. A. Broer, The direct summand property in modular invariant theory, Transform. Groups 10 (2005), no. 1, 5–27.
5. A. Broer, Differents in modular invariant theory, Transform. Groups 11 (2006), no. 4, 551–574.