@article{1077470402,
author = {Abian, Alexander and Brown, Arthur B.},
title = {Fixed points and covering under continuous mappings of a
spherical shell},
journal = {Duke Math. J.},
volume = {29},
number = {1},
year = {1962},
pages = { 653-655},
language = {en},
url = {http://dml.mathdoc.fr/item/1077470402}
}
Abian, Alexander; Brown, Arthur B. Fixed points and covering under continuous mappings of a
spherical shell. Duke Math. J., Tome 29 (1962) no. 1, pp. 653-655. http://gdmltest.u-ga.fr/item/1077470402/