@book{AST_1978__58__1_0,
     author = {Helffer, B. and Gallot, Sylvain and Polombo, Albert and B\'erard Bergery, Lionel and Averous, Genevi\`eve and Deschamps, Annie and Calabi, Eugenio and Bourguignon, J.-P. and Yau, Shing Tung and Ezin, J. P.},
     title = {Premi\`ere classe de {Chern} et courbure de {Ricci} : preuve de la conjecture de {Calabi}},
     series = {Ast\'erisque},
     publisher = {Soci\'et\'e math\'ematique de France},
     number = {58},
     year = {1978},
     language = {fr},
     url = {http://archive.numdam.org/item/AST_1978__58__1_0/}
}