@article{GDZPPN002102323,
title = {Averages of functions over hypersurfaces in Rn.},
journal = {Inventiones mathematicae},
volume = {82},
year = {1985},
pages = {543-556},
zbl = {0626.42009},
url = {http://dml.mathdoc.fr/item/GDZPPN002102323}
}
Stein, E.M.; Sogge, C.D. Averages of functions over hypersurfaces in Rn.. Inventiones mathematicae, Tome 82 (1985) pp. 543-556. http://gdmltest.u-ga.fr/item/GDZPPN002102323/