HENTOSH, O. E.; PRYKARPATSKY, Y. A.; BALINSKY, A.; PRYKARPATSKI, A. K. The dispersionless completely integrable heavenly type Hamiltonian flows and their differential-eometric structure. Annals of Mathematics and Physics, [S. l.], v. 2, n. 1, p. 011–025, 2019. DOI: 10.17352/amp.000006. Disponível em: https://www.peertechzpublications.us/amp/article/view/AMP-2-106. Acesso em: 10 jan. 2025.