@article{DAN_1982_267_3_a10,
     author = {S. S. Ryshkov and R. M. Erdahl},
     title = {The geometry of the integer roots of some quadratic equations in several unknowns},
     journal = {Doklady Akademii Nauk},
     pages = {561--563},
     publisher = {mathdoc},
     volume = {267},
     number = {3},
     year = {1982},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1982_267_3_a10/}
}