References
- Amer. J. Math. v.87 A certain subgroup of the fundamental group D. H. Gottlieb
- Amer. J. Math. v.91 Evaluation subgroups of homotopy groups D. H. Gottlieb
- J. of Korean Math. Soc. v.21 Certain subgroups of homotopy groups J. R. Kim;M. H. Woo
- Topology and its application v.52 The G-sequence and ω-homology of a CW-pair K. Y. Lee;M. H. Woo