%0 Journal Article %A B. S. Bardin %A A. N. Avdyushkin %T On Stability of the Collinear Libration Point $L_1$ %J Russian journal of nonlinear dynamics %D 2022 %P 543-562 %V 18 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/item/ND_2022_18_4_a5/ %G en %F ND_2022_18_4_a5