1. Apostolov, V., Calderbank, D.M.J., Gauduchon, P., Tønnesen-Friedman, C.: Hamiltonian 2-forms in Kähler geometry. II. Global classification. J. Differ. Geom. 68, 277–345 (2004)
2. Arias, C., Gover, A.R., Waldron, A.: Conformal geometry of embedded manifolds with boundary from universal holographic formulae. Adv. Math. 284, 107700, 75 (2021)
3. Bailey, T.N., Eastwood, M.G., Gover, A.R.: Thomas’s structure bundle for conformal, projective and related structures. Rocky Mt. J. Math. 24, 1191–1217 (1994)
4. Bailey, T.N., Eastwood, M.G., Graham, C.R.: Invariant theory for conformal and CR geometry. Ann. Math. 139, 491–552 (1994)
5. Baum, H., Leitner, F.: The geometric structure of Lorentzian manifolds with twistor spinors in low dimension. Dirac operators: yesterday and today, pp. 229–240. International Press, Somerville (2005)