Xenitidis P., Nijhoff F., “Symmetries and conservation laws of lattice Boussinesq equations”, Phys. Lett. A, 376:35 (2012), 2394–2401
Decio Levi, Christian Scimiterna, “Linearizability of Nonlinear Equations on a Quad-Graph by a Point, Two Points and Generalized Hopf–Cole Transformations”, SIGMA, 7 (2011), 079, 24 pp.
Mikhailov A.V., Wang J.P., “A new recursion operator for Adler's equation in the Viallet form”, Phys. Lett. A, 375:45 (2011), 3960–3963
Xenitidis P., “Symmetries and conservation laws of the ABS equations and corresponding differential-difference equations of Volterra type”, J. Phys. A, 44:43 (2011), 435201, 22 pp.
Mikhailov A.V., Wang J.P., Xenitidis P., “Cosymmetries and Nijenhuis recursion operators for difference equations”, Nonlinearity, 24:7 (2011), 2079–2097
Decio Levi, Ravil I. Yamilov, Symmetries and Integrability of Difference Equations, 2011, 160
И. Т. Хабибуллин, Е. В. Гудкова, “Алгебраический метод классификации $S$-интегрируемых дискретных моделей”, ТМФ, 167:3 (2011), 407–419 ; I. T. Habibullin, E. V. Gudkova, “An algebraic method for classifying S-integrable discrete models”, Theoret. and Math. Phys., 167:3 (2011), 751–761