Dense sums
Annales de l'I.H.P. Physique théorique, Volume 17 (1972) no. 3, p. 195-219
@article{AIHPA_1972__17_3_195_0,
     author = {Fano, G. and Gallavotti, Giovanni M.},
     title = {Dense sums},
     journal = {Annales de l'I.H.P. Physique th\'eorique},
     publisher = {Gauthier-Villars},
     volume = {17},
     number = {3},
     year = {1972},
     pages = {195-219},
     zbl = {0252.40001},
     mrnumber = {356789},
     language = {en},
     url = {http://www.numdam.org/item/AIHPA_1972__17_3_195_0}
}
Fano, G.; Gallavotti, G. Dense sums. Annales de l'I.H.P. Physique théorique, Volume 17 (1972) no. 3, pp. 195-219. http://www.numdam.org/item/AIHPA_1972__17_3_195_0/

[1] G. Fano and G. Loupias, Comm. Math. Phys., vol. 20, 1971, p. 143. | MR 287859

[2] H. Börner, Darstellungen von Gruppen Springer Verlag, Berlin, 1955, p. 28; see also F. Smithies, Duke Math. J., vol. 8, 1941, p. 107. | Zbl 0068.01603

[3] R.L. Dobrushin and R.A. Minlos, Theor. Prob. Appl., vol. 12, 1967, p. 535

[4] R.P. Boas, Entire functions, Academic Press, 1954, p. 24, Theorem 2.8.2. | MR 68627 | Zbl 0058.30201

[5] G. Fano and G. Loupias, Ann. Inst. H. Poincaré, Vol. XV, N° 2, 1971, p. 91. | Numdam | Zbl 0223.40002

[6] N. Dunford and J.T. Schwartz, Linear Operators, Interscience Publ., Vol I, 1964, Theorem IV. 9.15, p. 316.