References
- P. E. Conner and E. E. Floyd, Fixed point free involutions and equivariant maps, Bull. Amer. Math. Soc. 66 (1960), 416-441 https://doi.org/10.1090/S0002-9904-1960-10492-2
- P. E. Conner and E. E. Floyd, Fixed point free involutions and equivariant maps II, Trans. Amer. Math. Soc. 105 (1962), 222-228 https://doi.org/10.2307/1993624
- A. Haefliger and M. W. Hirsch, Immersions in the stable range, Ann. of Math. (2) 75 (1962), 231-241 https://doi.org/10.2307/1970171
- R. Tanaka, On the index and co-index of sphere bundles, Kyushu J. Math. 57 (2003), no. 2, 371-382 https://doi.org/10.2206/kyushujm.57.371
- R. Tanaka, On the stability of (co-)index of sphere bundles, Kyushu J. Math. 59 (2005), no. 2, 321-331 https://doi.org/10.2206/kyushujm.59.321
- R. Tanaka, The index and co-index of the twisted tangent bundle over projective spaces, Math. J. Ibaraki Univ. 37 (2005), 35-38 https://doi.org/10.5036/mjiu.37.35