@article{ZNSL_1977_68_a4,
     author = {L. N. Gordeev},
     title = {An approach to the constructivization of {Cantor's} set theory},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {38--50},
     publisher = {mathdoc},
     volume = {68},
     year = {1977},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_1977_68_a4/}
}