@incollection{SB_1978-1979__21__21_0,
     author = {Karcher, Hermann},
     title = {Report on {M.} {Gromov's} almost flat manifolds},
     booktitle = {S\'eminaire Bourbaki : vol. 1978/79, expos\'es 525-542},
     series = {S\'eminaire Bourbaki},
     note = {talk:526},
     pages = {21--35},
     publisher = {Springer-Verlag},
     number = {21},
     year = {1980},
     zbl = {0432.53022},
     language = {en},
     url = {http://archive.numdam.org/item/SB_1978-1979__21__21_0/}
}