[PDF] The theory of complex angular momenta: Gribov lectures on theoretical physics Ferrars E.X., Gribov V.N.

A unique and rigorous introduction to the theory of complex angular momenta, based on the methods of field theory. It comprises an English translation of a lecture course given by Vladimir Gribov in 1969. Besides their historical significance, these lectures contain material which is highly relevant to research today and is likely to form the basis for future developments in the subject.