@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},
     publisher = {Gauthier-Villars},
     volume = {54},
     number = {2},
     year = {1991},
     mrnumber = {1110652},
     zbl = {0816.35101},
     language = {en},
     url = {http://www.numdam.org/item/AIHPA_1991__54_2_199_0/}
}