no. 1
Mass singularities of generic Feynman amplitudes
Annales de l'institut Henri Poincaré. Section A, Physique Théorique, Tome 26 (1977) no. 1, pp. 87-105 
@article{AIHPA_1977__26_1_87_0,
     author = {Speer, Eug\`ene R.},
     title = {Mass singularities of generic {Feynman} amplitudes},
     journal = {Annales de l'institut Henri Poincar\'e. Section A, Physique Th\'eorique},
     pages = {87--105},
     year = {1977},
     publisher = {Gauthier-Villars},
     volume = {26},
     number = {1},
     mrnumber = {443643},
     language = {en},
     url = {https://www.numdam.org/item/AIHPA_1977__26_1_87_0/}
}
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Speer, Eugène R. Mass singularities of generic Feynman amplitudes. Annales de l'institut Henri Poincaré. Section A, Physique Théorique, Tome 26 (1977) no. 1, pp. 87-105. https://www.numdam.org/item/AIHPA_1977__26_1_87_0/

[1] E.R. Speer and M.J. Westwater, Ann. Inst. Henri Poincaré, t. 14, 1971, p. 1-55. | Zbl | MR | Numdam

[2] E.R. Speer, Ann. Inst. Henri Poincaré, t. 23, 1975, p. 1-21. | MR | Numdam