@article{10_4153_CMB_1967_020_8,
     author = {Bruckner, A. M.},
     title = {On {Characterizing} {Classes} of {Functions} in {Terms} of {Associated} {Sets}},
     journal = {Canadian mathematical bulletin},
     pages = {227--231},
     year = {1967},
     volume = {10},
     number = {2},
     doi = {10.4153/CMB-1967-020-8},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CMB-1967-020-8/}
}