Decio Levi, Miguel A. Rodríguez, “Non-Existence of S-Integrable Three-Point Partial Difference Equations in the Lattice Plane”, SIGMA, 19 (2023), 084, 7 pp.
J. C. Ndogmo, “Integrable classes of a family of evolution equations”, Journal of Mathematical Physics, 63:1 (2022)
Sergei Igonin, Gianni Manno, “On Lie algebras responsible for integrability of (1+1)-dimensional scalar evolution PDEs”, Journal of Geometry and Physics, 150 (2020), 103596
RAFAEL HERNÁNDEZ HEREDERO, ENRIQUE G. REYES, “NONLOCAL SYMMETRIES, COMPACTON EQUATIONS, AND INTEGRABILITY”, Int. J. Geom. Methods Mod. Phys., 10:09 (2013), 1350046
А. Г. Мешков, В. В. Соколов, “Интегрируемые эволюционные уравнения с постоянной сепарантой”, Уфимск. матем. журн., 4:3 (2012), 104–154
Enrique G. Reyes, “Equations of Pseudo-Spherical Type (After S.S. Chern and K. Tenenblat)”, Results. Math., 60:1-4 (2011), 53
А. Г. Мешков, “Нелокальные симметрии двухполевых дивергентных эволюционных систем”, ТМФ, 156:3 (2008), 351–363 ; A. G. Meshkov, “Nonlocal symmetries in two-field divergent evolutionary systems”, Theoret. and Math. Phys., 156:3 (2008), 1268–1279
Michal Marvan, “Scalar second-order evolution equations possessing an irreduciblesl2-valued zero-curvature representation”, J. Phys. A: Math. Gen., 35:44 (2002), 9431
Mikhail V. Foursov, Peter J. Olver, Enrique G. Reyes, “On formal integrability of evolution equations and local geometry of surfaces”, Differential Geometry and its Applications, 15:2 (2001), 183
Metin Gürses, Atalay Karasu, “Variable coefficient third order Korteweg–de Vries type of equations”, Journal of Mathematical Physics, 36:7 (1995), 3485