В. В. Козлов, “Об устойчивости равновесий в псевдоримановом пространстве”, УМН, 80:1(481) (2025), 59–84 ; V. V. Kozlov, “On stability of equilibria in a pseudo-Riemannian space”, Russian Math. Surveys, 80:1 (2025), 51–74
Ranislav M. Bulatovic, “A note on the Lyapunov stability of linear conservative gyroscopic systems”, Acta Mech, 232:12 (2021), 5041
В. В. Козлов, “Первые интегралы и асимптотические траектории”, Матем. сб., 211:1 (2020), 32–59 ; V. V. Kozlov, “First integrals and asymptotic trajectories”, Sb. Math., 211:1 (2020), 29–54
Valery V. Kozlov, Stanislav D. Furta, Springer Monographs in Mathematics, Asymptotic Solutions of Strongly Nonlinear Systems of Differential Equations, 2013, 169