1. Hitchin N., “Harmonic spinors,” Adv. Math., 14, 1–55 (1974).
2. Friedrich Th., “Zur Existenz paralleler Spinorfelder über Riemannschen Mannigfaltigkeiten,” Colloq. Math., 44, No. 2, 277–290 (1981).
3. Wang M., “Parallel spinors and parallel forms,” Ann. Global Anal. Geom., 7, No. 1, 59–68 (1989).
4. Leistner Th., “Lorentzian manifolds with special holonomy and parallel spinors,” Rend. Circ. Mat. Palermo (2) Suppl., No. 69, 131–159 (2002).
5. Leistner Th., Holonomy and Parallel Spinors in Lorentzian Geometry, Logos-Verlag and Humboldt-Universität zu Berlin, Berlin (2003).