@article{JRAM_1992__423_153385,
     author = {Stephen S.-T. Yau and Yi-Jing Xu},
     title = {A sharp estimate of the number of integral points in a tetrahedron.},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {199--219},
     publisher = {mathdoc},
     volume = {423},
     year = {1992},
     zbl = {0734.11048},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1992__423_153385/}
}