%0 Journal Article %A Claude LeBrun %T Twistors, Self-Duality, and Spin${}^c$ Structures %J Symmetry, integrability and geometry: methods and applications %D 2021 %V 17 %U http://geodesic.mathdoc.fr/item/SIGMA_2021_17_a101/ %G en %F SIGMA_2021_17_a101