@article{VMUMM_2001_6_a9,
     author = {D. A. Viter},
     title = {The constructive equality theory},
     journal = {Vestnik Moskovskogo universiteta. Matematika, mehanika},
     pages = {50--52},
     publisher = {mathdoc},
     number = {6},
     year = {2001},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VMUMM_2001_6_a9/}
}