@incollection{AST_1985__126__1_0,
     author = {AST},
     title = {G\'eom\'etrie des surfaces $K3$ : modules et p\'eriodes {[Pages} pr\'eliminaires]},
     booktitle = {G\'eom\'etrie des surfaces $K3$ : modules et p\'eriodes - S\'eminaire Palaiseau},
     series = {Ast\'erisque},
     pages = {1--6},
     publisher = {Soci\'et\'e math\'ematique de France},
     number = {126},
     year = {1985},
     language = {fr},
     url = {http://archive.numdam.org/item/AST_1985__126__1_0/}
}