1. Alessandrini, D., Collier, B.: The geometry of maximal components of the $$PSp(4,\mathbb{R})$$ character variety.
arXiv:1708.05361
2. Alessandrini, D., Li, Q.: AdS 3-manifolds and Higgs bundles.
arXiv:1510.07745
3. Alessandrini, D., Li, Q.: Personal communication
4. Aparicio Arroyo, M.: The geometry of $$SO(p,q)$$-Higgs bundles. Ph.D. thesis, Universidad de Salamanca, Consejo Superior de Investigaciones Científicas (2009)
5. Aparicio Arroyo, M., García-Prada, O.: Higgs bundles for the Lorentz group. Ill. J. Math. 55, 1299–1326 (2011)