analytic properties

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References

^{[1] [2]}

1. ↑ R. J. Eden, P. V. Landshoff, D. I. Olive, J. C. Polkinghorne (2002). The Analytic S-Matrix. Cambridge University Press. ISBN 978-0521523363. 
2. ↑ H. Lehmann (1966). "Analytic properties of scattering amplitudes in two variables in general quantum field theory". Comm. Math. Phys. 2 (5): 375-383. DOI:10.1007/BF01773361.