Oleg I. Morozov, “Contact integrable extensions of symmetry pseudo-groups and coverings of (2+1 ) dispersionless integrable equations”, Journal of Geometry and Physics, 59, no. 11, 2009, 1461
P. A. BUROVSKIY, E. V. FERAPONTOV, S. P. TSAREV, “SECOND-ORDER QUASILINEAR PDEs AND CONFORMAL STRUCTURES IN PROJECTIVE SPACE”, Int. J. Math., 21, no. 06, 2010, 799
Antonio J. Pan-Collantes, “Integrable (3 + 1)-Dimensional Generalization for the Dispersionless Davey–Stewartson System”, Qual. Theory Dyn. Syst., 23, no. 4, 2024, 151
E V Ferapontov, B Huard, A Zhang, “On the central quadric ansatz: integrable models and Painlevé reductions”, J. Phys. A: Math. Theor., 45, no. 19, 2012, 195204
Oksana E. Hentosh, Yarema A. Prykarpatsky, Denis Blackmore, Anatolij K. Prykarpatski, “Lie-algebraic structure of Lax–Sato integrable heavenly equations and the Lagrange–d’Alembert principle”, Journal of Geometry and Physics, 120, 2017, 208