@article{1103860199,
author = {Buchholz, Detlev},
title = {Threshold singularities of the $S$-matrix and convergence of Haag-Ruelle approximations},
journal = {Comm. Math. Phys.},
volume = {35},
number = {1},
year = {1974},
pages = { 221-241},
language = {en},
url = {http://dml.mathdoc.fr/item/1103860199}
}
Buchholz, Detlev. Threshold singularities of the $S$-matrix and convergence of Haag-Ruelle approximations. Comm. Math. Phys., Tome 35 (1974) no. 1, pp. 221-241. http://gdmltest.u-ga.fr/item/1103860199/