@article{00589783,
title = {On 2PFA's and the Hadamard quotient of formal power series.},
journal = {Bulletin of the Belgian Mathematical Society - Simon Stevin},
volume = {1},
year = {1994},
pages = {165-173},
zbl = {0803.68073},
language = {en},
url = {http://dml.mathdoc.fr/item/00589783}
}
Anselmo, Marcella; Bertoni, Alberto. On 2PFA's and the Hadamard quotient of formal power series.. Bulletin of the Belgian Mathematical Society - Simon Stevin, Tome 1 (1994) pp. 165-173. http://gdmltest.u-ga.fr/item/00589783/