@article{ZNSL_1983_121_a5,
     author = {A. V. Malyshev and Nguyen Ngor Goi},
     title = {On the distribution of integer points on some unparted hyperboloids},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {83--93},
     publisher = {mathdoc},
     volume = {121},
     year = {1983},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_1983_121_a5/}
}