Hambleton, Ian Max Planck Institute for Mathematics, Max Planck Society;
Hausmann, Jean-Claude Max Planck Institute for Mathematics, Max Planck Society;
Hambleton, I., & Hausmann, J.-C. (2003). Equivariant principal bundles over spheres and cohomogeneity one manifolds. Proceedings of the London Mathematical Society (3), 86, 250-272.