@incollection{AST_1992__209__279_0,
     author = {Scharlau, Rudolf and Walhorn, Claudia},
     title = {Integral lattices and hyperbolic reflection groups},
     booktitle = {Journ\'ees arithm\'etiques de Gen\`eve - 9-13 septembre 1991},
     editor = {Coray D. F. and P\'etermann Y.-F. S},
     series = {Ast\'erisque},
     pages = {279--291},
     publisher = {Soci\'et\'e math\'ematique de France},
     number = {209},
     year = {1992},
     zbl = {0815.20039},
     language = {en},
     url = {http://archive.numdam.org/item/AST_1992__209__279_0/}
}