@article{JRAM_1981__321_152318,
     author = {A.M. Odlyzko and N.J.A. Sloane},
     title = {On expections of integral quadratic forms.},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {212--216},
     publisher = {mathdoc},
     volume = {321},
     year = {1981},
     zbl = {0439.10015},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1981__321_152318/}
}