@article{10_1090_S0894_0347_1990_1070003_7,
     author = {Lubotzky, Alexander},
     title = {Lattices of minimal covolume in {\dh}‘†{\dh}{\textquestiondown}\^a‚‚: a {non-Archimedean} analogue of {Siegel\^a€™s} theorem {\dh}œ‡\^a‰{\textyen}{\dh}œ‹/21},
     journal = {Journal of the American Mathematical Society},
     pages = {961--975},
     publisher = {mathdoc},
     volume = {03},
     number = {4},
     year = {1990},
     doi = {10.1090/S0894-0347-1990-1070003-7},
     url = {http://geodesic.mathdoc.fr/articles/10.1090/S0894-0347-1990-1070003-7/}
}