@article{MV_1973_25_1_a49,
     author = {E. Pap},
     title = {O dijagonalnoj teoremi},
     journal = {Matemati\v{c}ki vesnik},
     pages = {391 },
     year = {1973},
     volume = {25},
     number = {1},
     url = {http://geodesic.mathdoc.fr/item/MV_1973_25_1_a49/}
}