@article{CRMATH_2009__347_5-6_333_0,
     author = {Jim\'enez P\'erez, Hugo and Lacomba, Ernesto A.},
     title = {On the periodic orbits of the circular double {Sitnikov} problem},
     journal = {Comptes Rendus. Math\'ematique},
     pages = {333--336},
     publisher = {Elsevier},
     volume = {347},
     number = {5-6},
     year = {2009},
     doi = {10.1016/j.crma.2009.01.011},
     language = {en},
     url = {http://www.numdam.org/articles/10.1016/j.crma.2009.01.011/}
}