@article{RCM_1976__10_181651,
     author = {Harold Bell},
     title = {A correction to my paper:},
     journal = {Revista colombiana de matematicas},
     pages = {93--94},
     publisher = {mathdoc},
     volume = {10},
     year = {1976},
     zbl = {0334.54020},
     url = {http://geodesic.mathdoc.fr/item/RCM_1976__10_181651/}
}