@article{DAN_1993_333_4_a12,
     author = {M. Yu. Glotova and A. A. Shvartsburg},
     title = {Geocentric synchronous halo orbits for solar sails},
     journal = {Doklady Akademii Nauk},
     pages = {457--459},
     publisher = {mathdoc},
     volume = {333},
     number = {4},
     year = {1993},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1993_333_4_a12/}
}