@article{01184308,
title = {Discrete analogues of singular and maximal Radon transforms.},
journal = {Documenta Mathematica},
year = {1998},
pages = {743-753},
zbl = {0971.44003},
language = {en},
url = {http://dml.mathdoc.fr/item/01184308}
}
Wainger, Stephen. Discrete analogues of singular and maximal Radon transforms.. Documenta Mathematica, (1998), pp. 743-753. http://gdmltest.u-ga.fr/item/01184308/