@article{MABA_1992_6_4_a6,
     author = {Ekrem Savaj},
     title = {Some {Sequence} {Spaces} with an {Index}},
     journal = {Mathematica balkanica},
     pages = {353},
     year = {1992},
     volume = {6},
     number = {4},
     url = {http://geodesic.mathdoc.fr/item/MABA_1992_6_4_a6/}
}