@article{MZ_1977__153_172483,
     author = {Moray S. Macphail},
     title = {Summability {Invariants.}},
     journal = {Mathematische Zeitschrift},
     pages = {99--100},
     publisher = {mathdoc},
     volume = {153},
     year = {1977},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/MZ_1977__153_172483/}
}