@article{10_4153_CMB_1973_101_2,
     author = {Beesack, Paul R.},
     title = {Correction},
     journal = {Canadian mathematical bulletin},
     pages = {623--623},
     year = {1973},
     volume = {16},
     number = {4},
     doi = {10.4153/CMB-1973-101-2},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CMB-1973-101-2/}
}