@article{10_4153_CMB_1974_046_2,
     author = {Macphail, M. S. and Wilansky, A.},
     title = {Linear {Functionals} and {Summability} {Invariants}},
     journal = {Canadian mathematical bulletin},
     pages = {233--242},
     year = {1974},
     volume = {17},
     number = {2},
     doi = {10.4153/CMB-1974-046-2},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CMB-1974-046-2/}
}