@article{MABA_2011_25_1-2_a4,
     author = {V. Valov},
     title = {External {Characterization} of {I-Favorable} {Spaces}},
     journal = {Mathematica balkanica},
     pages = {61},
     publisher = {mathdoc},
     volume = {25},
     number = {1-2},
     year = {2011},
     url = {http://geodesic.mathdoc.fr/item/MABA_2011_25_1-2_a4/}
}