@article{GDZPPN002236060,
title = {The Newton polygon of a product of power series.},
journal = {Manuscripta mathematica},
volume = {83},
year = {1994},
pages = {109-118},
zbl = {0827.13009},
url = {http://dml.mathdoc.fr/item/GDZPPN002236060}
}
Hoffmann, Detlev W. The Newton polygon of a product of power series.. Manuscripta mathematica, Tome 83 (1994) pp. 109-118. http://gdmltest.u-ga.fr/item/GDZPPN002236060/