@incollection{AST_1987__147-148__285_0,
     author = {Gekeler, Ernst-Ulrich},
     title = {Cohomologie des sous-groupes $s$-arithm\'etiques de $GL(2)$ sur un corps de fonctions},
     booktitle = {Journ\'ees arithm\'etiques de Besan\c{c}on},
     series = {Ast\'erisque},
     pages = {285--289},
     publisher = {Soci\'et\'e math\'ematique de France},
     number = {147-148},
     year = {1987},
     zbl = {0616.12008},
     language = {fr},
     url = {http://archive.numdam.org/item/AST_1987__147-148__285_0/}
}