@article{MABA_1987_1_1_a10,
     author = {K. Stathakopoulos},
     title = {A {Characterization} of {Smooth} {Spaces}},
     journal = {Mathematica balkanica},
     pages = {93},
     publisher = {mathdoc},
     volume = {1},
     number = {1},
     year = {1987},
     url = {http://geodesic.mathdoc.fr/item/MABA_1987_1_1_a10/}
}