@incollection{AST_1993__218__145_0,
     author = {Donagi, Ron},
     title = {Decomposition of spectral covers},
     booktitle = {Journ\'ees de g\'eom\'etrie alg\'ebrique d'Orsay - Juillet 1992},
     series = {Ast\'erisque},
     pages = {145--175},
     publisher = {Soci\'et\'e math\'ematique de France},
     number = {218},
     year = {1993},
     language = {en},
     url = {http://www.numdam.org/item/AST_1993__218__145_0/}
}