Alexey V. Bolsinov, Vladimir S. Matveev, Giuseppe Pucacco, “Normal forms for pseudo-Riemannian 2-dimensional metrics whose geodesic flows admit integrals quadratic in momenta”, Journal of Geometry and Physics, 59, no. 7, 2009, 1048
A V Tsiganov, “The Lax pairs for the Holt system”, J. Phys. A: Math. Gen., 32, no. 45, 1999, 7983
A V Tsiganov, “Properties of the canonical transformations of the time for the Toda lattice and the Henon-Heiles system”, J. Phys. A: Math. Gen., 33, no. 26, 2000, 4825
A. V. Tsiganov, “A Family of Integrable Systems on a Sphere”, Journal of Mathematical Sciences, 125, no. 2, 2005, 249
A. V. Tsiganov, “Toda Chains in the Jacobi Method”, Theoretical and Mathematical Physics, 139, no. 2, 2004, 636