@incollection{AST_1991__198-199-200__133_0,
     author = {Erez, Boas},
     title = {A survey of recent work on the square root of the inverse different},
     booktitle = {Journ\'ees arithm\'etiques de Luminy 17-21 Juillet 1989},
     editor = {Lachaud Gilles},
     series = {Ast\'erisque},
     pages = {133--152},
     publisher = {Soci\'et\'e math\'ematique de France},
     number = {198-199-200},
     year = {1991},
     mrnumber = {1144319},
     zbl = {0752.11048},
     language = {en},
     url = {http://www.numdam.org/item/AST_1991__198-199-200__133_0/}
}