@article{1103899254,
author = {Lowenstein, J. H. and Zimmermann, W.},
title = {The power counting theorem for Feynman integrals with massless propagators},
journal = {Comm. Math. Phys.},
volume = {40},
number = {1},
year = {1975},
pages = { 73-86},
language = {en},
url = {http://dml.mathdoc.fr/item/1103899254}
}
Lowenstein, J. H.; Zimmermann, W. The power counting theorem for Feynman integrals with massless propagators. Comm. Math. Phys., Tome 40 (1975) no. 1, pp. 73-86. http://gdmltest.u-ga.fr/item/1103899254/