@article{1029001362,
author = {Akiba, Tadatoshi},
title = {Homotopy groups of $E(S^n,S^{n+r})$.},
journal = {Michigan Math. J.},
volume = {21},
number = {3},
year = {1975},
pages = { 371-376},
language = {en},
url = {http://dml.mathdoc.fr/item/1029001362}
}
Akiba, Tadatoshi. Homotopy groups of $E(S^n,S^{n+r})$.. Michigan Math. J., Tome 21 (1975) no. 3, pp. 371-376. http://gdmltest.u-ga.fr/item/1029001362/