@article{701577,
     title = {Twistor theory, self-duality and integrability},
     booktitle = {Proceedings of the 15th Winter School "Geometry and Physics"},
     series = {GDML\_Books},
     publisher = {Circolo Matematico di Palermo},
     address = {Palermo},
     year = {1996},
     pages = {[77]-84},
     mrnumber = {MR1463510},
     zbl = {0910.32036},
     url = {http://dml.mathdoc.fr/item/701577}
}

Mason, L. J. Twistor theory, self-duality and integrability, dans Proceedings of the 15th Winter School "Geometry and Physics", GDML_Books,  (1996), pp. [77]-84. http://gdmltest.u-ga.fr/item/701577/