@article{bwmeta1.element.bwnjournal-article-smv34i1p25bwm,
author = {Miguel de Guzm\'an},
title = {A covering lemma with applications to differentiability of measures and singular integral operators},
journal = {Studia Mathematica},
volume = {34},
year = {1970},
pages = {299-317},
zbl = {0192.48804},
language = {en},
url = {http://dml.mathdoc.fr/item/bwmeta1.element.bwnjournal-article-smv34i1p25bwm}
}
de Guzmán, Miguel. A covering lemma with applications to differentiability of measures and singular integral operators. Studia Mathematica, Tome 34 (1970) pp. 299-317. http://gdmltest.u-ga.fr/item/bwmeta1.element.bwnjournal-article-smv34i1p25bwm/