Conformal geometry of surfaces in S⁴ and quaternionsFrancis E. Burstall · First published 2002Open the Tome
Twister theory for riemannian symetric spacesFrancis E. Burstall, John H. Rawnsley · First published 1990Open the Tome
Twistor theory for Riemannian symmetric spacesFrancis E. Burstall, John H. Rawnsley · First published 1990Open the Tome