@article{ZNSL_1997_236_a21,
     author = {V. M. Tsvetkov},
     title = {On some 2-extension of the field~$\mathbb Q$ of rational numbers},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {192--196},
     year = {1997},
     volume = {236},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_1997_236_a21/}
}