This paper presents a simple graphical method, closely related to the "algebrochemical method" of Clifford and Sylvester, for computations in the classical invariant theory of binary forms. Applications to syzygies and transvectants of covariants, and the determination of a Hilbert basis of covariants using Gordan's method are presented. © 1989.
Olver, P. J., & Shakiban, C. (1989). Graph theory and classical invariant theory. Advances in Mathematics, 75(2), 212–245. https://doi.org/10.1016/0001-8708(89)90038-8