TY - BOOK AU - Doebner, H. D. AU - Palev,Tchardar D. ED - Bulgarian Summer School on Mathematical Problems of Quantum Field Theory TI - Twistor geometry and non-linear systems: review lectures given at the 4th Bulgarian Summer School on Mathematical Problems of Quantum Field Theory, Held at Primorsko, Bulgaria, September 1980 SN - 3540119728 PY - 1982/// CY - Berlin PB - Springer-Verlag KW - Twistor theory KW - Mathematical physics N1 - Includes bibliographical references ER -