1.
HIRANO, Norimichi and RYBICKI, Sławomir. Some remarks on degree theory for ${\text{\rm SO}(2)}$-equivariant transversal maps. Topological Methods in Nonlinear Analysis. Online. 1 December 2003. Vol. 22, no. 2, pp. 253 - 272. [Accessed 22 July 2024].