MANIN, Yuri I. and MERKULOV, S. A. Semisimple Frobenius (super)manifolds and quantum cohomology of $\mathbb P}^r$. Topological Methods in Nonlinear Analysis. Online. 1 March 1997. Vol. 9, no. 1, pp. 107 - 161. [Accessed 22 July 2024].