@article{MZ_1962__79_170049,
     author = {S. Minakshisundaram},
     title = {On the multiplication of {Dirichlet} series.},
     journal = {Mathematische Zeitschrift},
     pages = {44--52},
     publisher = {mathdoc},
     volume = {79},
     year = {1962},
     zbl = {0113.28501},
     url = {http://geodesic.mathdoc.fr/item/MZ_1962__79_170049/}
}