@article{PDML_1985___2B_59_0,
     author = {Pouzet, Maurice},
     title = {Une approche m\'etrique de la r\'etraction dans les ensembles ordonn\'es et les graphes},
     journal = {Publications du D\'epartement de math\'ematiques (Lyon)},
     pages = {59--89},
     publisher = {Universit\'e Claude Bernard - Lyon 1},
     number = {2B},
     year = {1985},
     mrnumber = {848825},
     zbl = {0606.54035},
     language = {fr},
     url = {http://archive.numdam.org/item/PDML_1985___2B_59_0/}
}