@incollection{AST_2013__352__83_0,
     author = {Pansu, Pierre},
     title = {Difficult\'e d'approximation [d'apr\`es {Khot,} {Kindler,} {Mossel,} {O'Donnell,...]}},
     booktitle = {S\'eminaire Bourbaki volume 2011/2012 expos\'es 1043-1058},
     series = {Ast\'erisque},
     note = {talk:1045},
     pages = {83--120},
     publisher = {Soci\'et\'e math\'ematique de France},
     number = {352},
     year = {2013},
     mrnumber = {3087343},
     zbl = {06295886},
     language = {fr},
     url = {http://www.numdam.org/item/AST_2013__352__83_0/}
}