@article{10_4153_CMB_1980_061_1,
     author = {Macphail, M. S.},
     title = {A {Summability} {Problem}},
     journal = {Canadian mathematical bulletin},
     pages = {421--424},
     year = {1980},
     volume = {23},
     number = {4},
     doi = {10.4153/CMB-1980-061-1},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CMB-1980-061-1/}
}