- Kostyantyn V Zheltukhin, Natal'ya Aleksandrovna Zheltukhina, “On discretization of Darboux Integrable Systems admitting second-order integrals”, Ufimsk. Mat. Zh., 13, № 2, 2021, 170

- V. Rosenhaus, “Infinite conservation laws for differential systems”, Theor Math Phys, 160, № 1, 2009, 1042

- I. T. Habibullin, A. Pekcan, “Characteristic Lie algebra and classification of semidiscrete models”, Theor Math Phys, 151, № 3, 2007, 781

- S Ya Startsev, “Darboux integrability of hyperbolic partial differential equations: is it a property of integrals rather than equations?”, J. Phys. A: Math. Theor., 58, № 2, 2025, 025206

- Yuri Berest, Alexander Veselov, “On the Structure of Singularities of Integrable Schrödinger Operators”, Letters in Mathematical Physics, 52, № 2, 2000, 103

- A. V. Zhiber, S. Ya. Startsev, “Integrals, Solutions, and Existence Problems for Laplace Transformations of Linear Hyperbolic Systems”, Mathematical Notes, 74, № 5-6, 2003, 803

- S. Ya. Startsev, “Hyperbolic Equations Admitting Differential Substitutions”, Theoretical and Mathematical Physics, 127, № 1, 2001, 460

- A. M. Guryeva, A. V. Zhiber, “Laplace Invariants of Two-Dimensional Open Toda Lattices”, Theoretical and Mathematical Physics, 138, № 3, 2004, 338

- V. É. Adler, A. B. Shabat, R. I. Yamilov, “Symmetry Approach to the Integrability Problem”, Theoretical and Mathematical Physics, 125, № 3, 2000, 1603

- Sergey Yakovlevich Startsev, “Об интегрируемых по Дарбу уравнениях с неавтономными интегралами первого порядка”, Теоретическая и математическая физика, 225, № 2, 2025, 251
