@article{ND_2015_11_1_a5,
     author = {Vyacheslav O. Kalas and Pavel S. Krasilnikov},
     title = {On the investigation of stability of equilibrium in {Sitnikov} problem in~nonlinear formulation},
     journal = {Russian journal of nonlinear dynamics},
     pages = {117--126},
     publisher = {mathdoc},
     volume = {11},
     number = {1},
     year = {2015},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ND_2015_11_1_a5/}
}