@article{DAN_1996_350_1_a11,
     author = {V. N. Tkhai},
     title = {Symmetric periodic orbits of the third kind in an $N$-planet},
     journal = {Doklady Akademii Nauk},
     pages = {52--55},
     publisher = {mathdoc},
     volume = {350},
     number = {1},
     year = {1996},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1996_350_1_a11/}
}