@article{TM_1981_158_a4,
     author = {E. P. Golubeva and O. M. Fomenko},
     title = {Distribution of lattice points of two-sheeted hyperboloids},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     pages = {69--79},
     publisher = {mathdoc},
     volume = {158},
     year = {1981},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TM_1981_158_a4/}
}