@article{1240434247, author = {KOBAYASHI, Kazuaki and TSUKUI., Yasuyuki}, title = {The ball coverings of manifolds}, journal = {J. Math. Soc. Japan}, volume = {28}, number = {4}, year = {1976}, pages = { 133-143}, language = {en}, url = {http://dml.mathdoc.fr/item/1240434247} }
KOBAYASHI, Kazuaki; TSUKUI., Yasuyuki. The ball coverings of manifolds. J. Math. Soc. Japan, Tome 28 (1976) no. 4, pp. 133-143. http://gdmltest.u-ga.fr/item/1240434247/