@article{MS2_1973__33_166334,
     author = {Johan Havnen},
     title = {Completely {Monotonic} {Functions} on {n-Dimensional} {Lattices.}},
     journal = {Mathematica Scandinavica},
     pages = {314--322},
     publisher = {mathdoc},
     volume = {33},
     year = {1973},
     zbl = {0281.26006},
     url = {http://geodesic.mathdoc.fr/item/MS2_1973__33_166334/}
}