@article{JRAM_1995__473_153802,
     author = {Stephen S.-T. Yau and Yi-Jing Xu},
     title = {A sharp estimate of the number of integral points in a 4-dimensional tetrahedra.},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {1--24},
     publisher = {mathdoc},
     volume = {473},
     year = {1995},
     zbl = {0844.11063},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1995__473_153802/}
}