@article{TM_2016_294_a3,
     author = {S. V. Konyagin and M. A. Korolev},
     title = {On a~symmetric diophantine equation with reciprocals},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     pages = {76--86},
     publisher = {mathdoc},
     volume = {294},
     year = {2016},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TM_2016_294_a3/}
}