@misc{10_4153_CMB_1978_088_4,
     title = {Errata},
     journal = {Canadian mathematical bulletin},
     pages = {508--508},
     year = {1978},
     volume = {21},
     number = {4},
     doi = {10.4153/CMB-1978-088-4},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CMB-1978-088-4/}
}