@article{MAN_1967__171_161563,
     author = {R.A. ALO and O. FRINK},
     title = {Topologies of {Chains.}},
     journal = {Mathematische Annalen},
     pages = {239--246},
     publisher = {mathdoc},
     volume = {171},
     year = {1967},
     zbl = {0149.40201},
     url = {http://geodesic.mathdoc.fr/item/MAN_1967__171_161563/}
}