@article{10_4153_CMB_1979_039_5,
     author = {Mercier, Armel},
     title = {Identit\'e {Pour}},
     journal = {Canadian mathematical bulletin},
     pages = {317--325},
     year = {1979},
     volume = {22},
     number = {3},
     doi = {10.4153/CMB-1979-039-5},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CMB-1979-039-5/}
}