@article{10_4153_CMB_1970_033_2,
     author = {Sember, John J.},
     title = {The {Associative} {Part} of a {Convergence} {Domain} is {Invariant}},
     journal = {Canadian mathematical bulletin},
     pages = {147--148},
     year = {1970},
     volume = {13},
     number = {1},
     doi = {10.4153/CMB-1970-033-2},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CMB-1970-033-2/}
}