@article{PORMA_1999__56_2_48513, author = {L\^e Hai Kh\^oi}, title = {A note on matrix transformations of holomorphic {Dirichlet} series.}, journal = {Portugaliae mathematica}, pages = {195--203}, publisher = {mathdoc}, volume = {56}, number = {2}, year = {1999}, zbl = {0944.32001}, language = {en}, url = {http://geodesic.mathdoc.fr/item/PORMA_1999__56_2_48513/} }