@article{MAN_1965__158_161254,
     author = {D.V. THAMPURAN},
     title = {Extended {Topology:} {Filters} and {Convergence.} {I.}},
     journal = {Mathematische Annalen},
     pages = {57--68},
     publisher = {mathdoc},
     volume = {158},
     year = {1965},
     zbl = {0132.17801},
     url = {http://geodesic.mathdoc.fr/item/MAN_1965__158_161254/}
}