@article{ZNSL_1967_4_a2,
     author = {G. V. Davydov},
     title = {On correction of unprovable formulae},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {18--29},
     publisher = {mathdoc},
     volume = {4},
     year = {1967},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_1967_4_a2/}
}