@article{GDZPPN002066645,
title = {Power series with integer coefficients in several variables.},
journal = {Commentarii mathematici Helvetici},
volume = {62},
year = {1987},
pages = {602-615},
zbl = {0638.32001},
url = {http://dml.mathdoc.fr/item/GDZPPN002066645}
}
Straube, E.J. Power series with integer coefficients in several variables.. Commentarii mathematici Helvetici, Tome 62 (1987) pp. 602-615. http://gdmltest.u-ga.fr/item/GDZPPN002066645/