@article{10_1090_S0894_0347_1990_1070003_7,
     author = {Lubotzky, Alexander},
     title = {Lattices of minimal covolume in {\ensuremath{\mathit{S}}\ensuremath{\mathit{L}}₂:} a {non-Archimedean} analogue of {Siegel{\textquoteright}s} theorem 𝜇\ensuremath{\geq}𝜋/21},
     journal = {Journal of the American Mathematical Society},
     pages = {961--975},
     year = {1990},
     volume = {03},
     number = {4},
     doi = {10.1090/S0894-0347-1990-1070003-7},
     url = {http://geodesic.mathdoc.fr/articles/10.1090/S0894-0347-1990-1070003-7/}
}