- D Levi, P Winternitz, “Lie point symmetries and commuting flows for equations on lattices”, J. Phys. A: Math. Gen., 35, № 9, 2002, 2249
- Decio Levi, Pavel Winternitz, “Continuous symmetries of difference equations”, J. Phys. A: Math. Gen., 39, № 2, 2006, R1
- D Levi, S Tremblay, P Winternitz, “Lie point symmetries of difference equations and lattices”, J. Phys. A: Math. Gen., 33, № 47, 2000, 8507
- V. E. Adler, “Negative flows and non-autonomous reductions of the Volterra lattice”, Open Communications in Nonlinear Mathematical Physics, Special Issue in Memory of..., 2024, 11597