no. 2
Polynomial bounds on the number of scattering poles for symmetric systems
Annales de l'I.H.P. Physique théorique, Tome 54 (1991) no. 2, pp. 199-208 
@article{AIHPA_1991__54_2_199_0,
     author = {Vodev, G.},
     title = {Polynomial bounds on the number of scattering poles for symmetric systems},
     journal = {Annales de l'I.H.P. Physique th\'eorique},
     pages = {199--208},
     year = {1991},
     publisher = {Gauthier-Villars},
     volume = {54},
     number = {2},
     mrnumber = {1110652},
     zbl = {0816.35101},
     language = {en},
     url = {https://www.numdam.org/item/AIHPA_1991__54_2_199_0/}
}
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Vodev, G. Polynomial bounds on the number of scattering poles for symmetric systems. Annales de l'I.H.P. Physique théorique, Tome 54 (1991) no. 2, pp. 199-208. https://www.numdam.org/item/AIHPA_1991__54_2_199_0/

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