@article{ZNSL_1993_208_a0,
     author = {A. A. Ivanov},
     title = {Problems of the theory of bitopological spaces.~2},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {5--67},
     publisher = {mathdoc},
     volume = {208},
     year = {1993},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_1993_208_a0/}
}