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			1 | 
		
			
									
						Twistors and Killing spinors on Riemannian manifolds Stuttgart : Teubner, 1991
					
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			2 | 
		
			
									
						Twistor theory for Riemannian symmetric spaces Burstall, Francis E.. - Berlin : Springer, 1990
					
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			3 | 
		
			
									
						Conformal description of spinning particles Todorov, Ivan T.. - Berlin : Springer, 1986
					
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			4 | 
		
			
									
						On Einstein metrics on the twistor space of a four dimensional Riemannian manifold Friedrich, Thomas. - Berlin : Humboldt-Univ., Sekt. Mathematik, 1983
					
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			5 | 
		
			
									
						On surfaces in four spaces Friedrich, Thomas. - Berlin : Humboldt-Univ., Sekt. Mathematik, 1983
					
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			6 | 
		
			
									
						Twistor geometry and non-linear systems Berlin : Springer, 1982
					
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			7 | 
		
			
									
						Twistors and particles Hughston, Lane P.. - Berlin, Heidelberg, New York : Springer, 1979
					
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