@incollection{AST_1979__66-67__68_0,
     author = {Fathi, Albert},
     title = {Appendice : {Double} d\'ecomposition d'une surface en pantalons},
     booktitle = {Travaux de Thurston sur les surfaces - S\'eminaire Orsay},
     series = {Ast\'erisque},
     pages = {68--70},
     publisher = {Soci\'et\'e math\'ematique de France},
     number = {66-67},
     year = {1979},
     zbl = {0446.57009},
     language = {fr},
     url = {http://www.numdam.org/item/AST_1979__66-67__68_0/}
}