@article{JRAM_1974__0268_0269_151463,
     author = {Takashi Ono},
     title = {Hasse principle for {Hopf} maps.},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {209--212},
     publisher = {mathdoc},
     volume = {0268_0269},
     year = {1974},
     zbl = {0286.12008},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1974__0268_0269_151463/}
}