@article{GDZPPN002239647, title = {A note on smooth toral reductions of spheres.}, journal = {Manuscripta mathematica}, volume = {95}, year = {1998}, pages = {149-158}, zbl = {0913.53020}, url = {http://dml.mathdoc.fr/item/GDZPPN002239647} }
Boyer, Charles P. A note on smooth toral reductions of spheres.. Manuscripta mathematica, Tome 95 (1998) pp. 149-158. http://gdmltest.u-ga.fr/item/GDZPPN002239647/