Calderbank, David M. J.; Kruglikov, Boris (2021). "Integrability via geometry: dispersionless differential equations in three and four dimensions". Communications in Mathematical Physics. 382 (3): 1811–1841. arXiv:1612.02753. doi:10.1007/s00220-020-03913-y. MR4232780.
Calderbank, David M. J.; Kruglikov, Boris (2021). "Integrability via geometry: dispersionless differential equations in three and four dimensions". Communications in Mathematical Physics. 382 (3): 1811–1841. arXiv:1612.02753. doi:10.1007/s00220-020-03913-y. MR4232780.
Calderbank, David M. J.; Kruglikov, Boris (2021). "Integrability via geometry: dispersionless differential equations in three and four dimensions". Communications in Mathematical Physics. 382 (3): 1811–1841. arXiv:1612.02753. doi:10.1007/s00220-020-03913-y. MR4232780.