@article{GDZPPN002411911,
title = {A Characterization of the Hopf Map by Stretch.},
journal = {Mathematische Zeitschrift},
volume = {129},
year = {1972},
pages = {195-206},
zbl = {0235.53022},
url = {http://dml.mathdoc.fr/item/GDZPPN002411911}
}
Hasu, Agnes Chi-Ling. A Characterization of the Hopf Map by Stretch.. Mathematische Zeitschrift, Tome 129 (1972) pp. 195-206. http://gdmltest.u-ga.fr/item/GDZPPN002411911/