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- [3] SPHERE BUNDLES OVER SPHERES WHICH ARE H-SPACES ATTI DELLA ACCADEMIA NAZIONALE DEI LINCEI RENDICONTI-CLASSE DI SCIENZE FISICHE-MATEMATICHE & NATURALI, 1968, 44 (04): : 502 - &
- [6] SOME EXAMPLES OF DIFFERENTIABLE SPHERE BUNDLES JOURNAL OF THE FACULTY OF SCIENCE UNIVERSITY OF TOKYO SECTION 1-MATHEMATICS ASTRONOMY PHYSICS CHEMISTRY, 1970, 16 : 477 - &