TY - JOUR AU - Claude LeBrun TI - Twistors, Self-Duality, and Spin${}^c$ Structures JO - Symmetry, integrability and geometry: methods and applications PY - 2021 VL - 17 UR - http://geodesic.mathdoc.fr/item/SIGMA_2021_17_a101/ LA - en ID - SIGMA_2021_17_a101 ER -