@incollection{SB_1980-1981__23__36_0,
     author = {Lanford III, Oscar E.},
     title = {Smooth transformations of intervals},
     booktitle = {S\'eminaire Bourbaki : vol. 1980/81, expos\'es 561-578},
     series = {S\'eminaire Bourbaki},
     note = {talk:563},
     pages = {36--54},
     publisher = {Springer-Verlag},
     number = {23},
     year = {1981},
     mrnumber = {647487},
     zbl = {0514.58028},
     language = {en},
     url = {http://archive.numdam.org/item/SB_1980-1981__23__36_0/}
}