@misc{10_4153_CMB_1972_030_1,
     title = {Corrections},
     journal = {Canadian mathematical bulletin},
     pages = {148--148},
     year = {1972},
     volume = {15},
     number = {1},
     doi = {10.4153/CMB-1972-030-1},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CMB-1972-030-1/}
}