@article{MZ_1968__103_170904,
     author = {D.L. Prullage},
     title = {Summability in {Topological} {Groups.}},
     journal = {Mathematische Zeitschrift},
     pages = {129--138},
     publisher = {mathdoc},
     volume = {103},
     year = {1968},
     zbl = {0153.38701},
     url = {http://geodesic.mathdoc.fr/item/MZ_1968__103_170904/}
}