@book{AST_1994__225__1_0,
     author = {Breen, Lawrence},
     title = {On the classification of 2-gerbes and 2-stacks},
     series = {Ast\'erisque},
     publisher = {Soci\'et\'e math\'ematique de France},
     number = {225},
     year = {1994},
     mrnumber = {1301844},
     zbl = {0818.18005},
     language = {en},
     url = {http://www.numdam.org/item/AST_1994__225__1_0/}
}