@article{JRAM_1991__416_153314,
     author = {Ekkehard Kr\"atzel},
     title = {Lattice points in elliptic paraboloids.},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {25--48},
     publisher = {mathdoc},
     volume = {416},
     year = {1991},
     zbl = {0716.11046},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1991__416_153314/}
}