@article{ZNSL_1977_67_a10,
     author = {L. I. Roginskii},
     title = {Representation of the direct sum of two quadratic fields by rational symmetric matrices},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {195--200},
     publisher = {mathdoc},
     volume = {67},
     year = {1977},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_1977_67_a10/}
}