- R Hernández Heredero, A Shabat, V Sokolov, “A new class of linearizable equations”, J. Phys. A: Math. Gen., 36, № 47, 2003, L605
- Dmitry Demskoi, “On application of Liouville type equations to constructing Bäcklund transformations”, JNMP, 14, № 1, 2007, 147
- Jan A Sanders, Jing Ping Wang, “On the integrability of systems of second order evolution equations with two components”, Journal of Differential Equations, 203, № 1, 2004, 1
- Martin Juráš, Ian M. Anderson, “Generalized Laplace invariants and the method of Darboux”, Duke Math. J., 89, № 2, 1997
- D. E. Baldwin, W. Hereman, “A symbolic algorithm for computing recursion operators of nonlinear partial differential equations”, International Journal of Computer Mathematics, 87, № 5, 2010, 1094
- A. Sergyeyev, “On the classification of conditionally integrable evolution systems in (1 + 1) dimensions”, J Math Sci, 136, № 6, 2006, 4392
- V. S. Novikov, E. V. Ferapontov, “On the classification of scalar evolutionary integrable equations in 2 + 1 dimensions”, Journal of Mathematical Physics, 52, № 2, 2011, 023516
- “Direct reduction and differential constraints”, Proc. R. Soc. Lond. A, 444, № 1922, 1994, 509
- Rafael Hernández Heredero, “Classification of Fully Nonlinear Integrable Evolution Equations of Third Order”, JNMP, 12, № 4, 2005, 567
- Handbook of Nonlinear Partial Differential Equations, Second Edition, 2011, 1795