@incollection{AST_1994__226__211_0, author = {Langer, Andreas}, title = {On a specialization map in $K_2$-cohomology}, booktitle = {$K$-theory - Strasbourg, 1992}, author = {Collectif}, series = {Ast\'erisque}, publisher = {Soci\'et\'e math\'ematique de France}, number = {226}, year = {1994}, zbl = {0826.19002}, mrnumber = {1317121}, language = {en}, url = {http://archive.numdam.org/item/AST_1994__226__211_0/} }