@article{DAN_1966_170_3_a7,
     author = {V. I. Ponomarev},
     title = {Borel sets in perfectly normal bicompacta},
     journal = {Doklady Akademii Nauk},
     pages = {520--523},
     publisher = {mathdoc},
     volume = {170},
     number = {3},
     year = {1966},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1966_170_3_a7/}
}