@article{MAN_1961__144_160876,
     author = {E.F. COLLINGWOOD and G. PIRANIAN},
     title = {Asymmetric {Prime} {Ends.}},
     journal = {Mathematische Annalen},
     pages = {59--63},
     year = {1961},
     volume = {144},
     zbl = {0113.05601},
     url = {http://geodesic.mathdoc.fr/item/MAN_1961__144_160876/}
}