1. Vector fields with finite singularities;Atiyah;Acta Math.,1972
2. Join products and indices of k-fields over differentiable fiber bundles;Cardim;Topol. Appl.,2004
3. The Topology of Stiefel Manifolds, vol. 24;James,1976
4. Vector Fields and Other Vector Bundles Morphisms – A Singularity Approach;Koschorke,1981
5. Some homotopy groups of real Stiefel manifolds in the metastable range I;Nomura;Sci. Rep., Col. Gen. Educ., Osaka Univ.,1978