@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/