@article{10_4153_CMB_1972_013_0,
     author = {Cass, Frank P.},
     title = {Some {Theorems} on {Strong} {N\"orlund} {Summability}},
     journal = {Canadian mathematical bulletin},
     pages = {63--69},
     year = {1972},
     volume = {15},
     number = {1},
     doi = {10.4153/CMB-1972-013-0},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CMB-1972-013-0/}
}