References
H. Harari:Phys. Rev. Lett.,20, 1395 (1968).
D. H. Lith:Lett. Nuovo Cimento,2, 724 (1969).
M. Ademollo andE. Del Giudice:Nuovo Cimento,63 A, 639 (1969).
For a discussion of the properties of trajectories with such analytic structure see for instanceN. Khuri:Phys. Rev. Lett.,18, 1094 (1967).
F. Cerulus andA. Martin:Phys. Lett.,8, 80 (1964).
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This work has been supported in part through funds provided by the U.S. Atomic Energy Commission under Contract No. AT(30-1) 2098.
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Del Giudice, E., Veneziano, G. Dual models, pomeranchuk term and crossing symmetry. Lettere Nuovo Cimento (1969-1970) 3, 363–368 (1970). https://doi.org/10.1007/BF02755714
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DOI: https://doi.org/10.1007/BF02755714