@book{15580,
	author = {Burstall, Francis E. and Rawnsley, John Y. and Rawnsley, John Y. ; jt. auth.},
	title = {Twistor theory for Riemannian symmetric spaces with applications to harmonic maps of Riemann surface},
	publisher = {Springer-Verlag},
	year = {1990},
	series = {Lecture notes in Mathematics},
	address = {Berlin}
}