@article{GDZPPN002205475,
title = {On smooth extensions of odd dimensional spheres and multidimensional Helton and Howe formula.},
journal = {Journal f\"ur die reine und angewandte Mathematik},
volume = {390},
year = {1988},
pages = {145-171},
zbl = {0635.46054},
url = {http://dml.mathdoc.fr/item/GDZPPN002205475}
}
Radulescu, Florin. On smooth extensions of odd dimensional spheres and multidimensional Helton and Howe formula.. Journal für die reine und angewandte Mathematik, Tome 390 (1988) pp. 145-171. http://gdmltest.u-ga.fr/item/GDZPPN002205475/