no. 2
Induction from a normal nilpotent subgroup
Annales de l'institut Henri Poincaré. Section A, Physique Théorique, Tome 26 (1977) no. 2, pp. 181-192. 
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     author = {Giovannini, N.},
     title = {Induction from a normal nilpotent subgroup},
     journal = {Annales de l'institut Henri Poincar\'e. Section A, Physique Th\'eorique},
     pages = {181--192},
     publisher = {Gauthier-Villars},
     volume = {26},
     number = {2},
     year = {1977},
     mrnumber = {460542},
     zbl = {0349.22005},
     language = {en},
     url = {http://archive.numdam.org/item/AIHPA_1977__26_2_181_0/}
}
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Giovannini, N. Induction from a normal nilpotent subgroup. Annales de l'institut Henri Poincaré. Section A, Physique Théorique, Tome 26 (1977) no. 2, pp. 181-192. http://archive.numdam.org/item/AIHPA_1977__26_2_181_0/

[1] G. Frobenius, Sitz. Preus. Akad. Wiss., 1898, p. 501. | JFM

[2] E.P. Wigner, Ann. of Math., t. 40, 1939, p. 149. | JFM | Zbl

[3] For a review of the theory see for example G.W. Mackey, Lecture notes, U. P. Oxford, 1971.

[4] G.W. Mackey, Acta Math., t. 99, 1958, p. 265. | MR | Zbl

[5] A. Guichardet, Séminaire Bourbaki, 1962-1963, n° 249. | Numdam

[6] A. Kirillov, Uspekhi Mat. Nauk., t. 17, 1962, p. 57. | MR | Zbl

[7] J. Dixmier, Can. J. Math., t. 10, 1958, p. 321. | MR | Zbl

[8] N. Giovannini, Elementary particles in external e. m. fields, to appear in Helv. Phys. Acta. | MR

[9] E. Angelopoulos, Ann. Inst. H. Poincaré, t. 18, 1973, p. 39. | Numdam | MR