@article{MV_1979_31_1_a11,
     author = {V. Popa},
     title = {On some properties of bitopological semi-separate spaces},
     journal = {Matemati\v{c}ki vesnik},
     pages = {71 },
     year = {1979},
     volume = {31},
     number = {1},
     url = {http://geodesic.mathdoc.fr/item/MV_1979_31_1_a11/}
}