1. L. Bedratyuk, On complete system of invariants for the binary form of degree 7, J. Symb. Comput. 42 (2007), 935–947.
2. Л. П. Бедратюк, С. Л. Бедратюк, Повна система коварiантiв бiнарноï форми восьмого порядку, Мат. Вiсн. Наук. Тов. им. Шевченка 5 (2008), 11–22. [L. P. Bedratyuk, S. L. Bedratiuk, A complete system of covariants for the binary form of degree 8, Mat. Visn. Nauk. Tov. Im. Shevchenka 5 (2008), 11–22. (Ukrainian)]. (Cf. L. Bedratyuk, On complete system of covariants for the binary form of degree 8, arXiv 0612113v1 (2006).)
3. A. Bessel, Ueber die Invarianten der einfachsten Systeme simultaner binärer Formen, Math. Ann. 1 (1869), 173–194.
4. M. Brion, Invariants de plusieurs formes binaires, Bull. Soc. Math. France 110 (1982), no. 4, 429–445.
5. A. E. Brouwer, Invariants of binary forms, http://www.win.tue.nl/~aeb/math/invar.html .