@article{MM2_1998__95_3_156366,
     author = {Charles P. Boyer},
     title = {A note on smooth toral reductions of spheres.},
     journal = {Manuscripta mathematica},
     pages = {149--158},
     publisher = {mathdoc},
     volume = {95},
     number = {3},
     year = {1998},
     zbl = {0913.53020},
     url = {http://geodesic.mathdoc.fr/item/MM2_1998__95_3_156366/}
}