1. A note on hyperhermitian four-manifolds;Boyer,1988
2. (4, 0) and (4, 4) sigma models with a triholomorphic Killing vector;Chave;Phys. Lett. B,1996
3. Hyper-Hermitian metrics with symmetry;Gauduchon;J. Geom. Phys.,1998
4. Hyper-Complex Manifolds and Integrable Systems;Grant,1998
5. heavenly hierarchies and curved twistor spaces;Dunajski;Twistor Newsletter,1996