Sets of integers composed of few prime numbers
Séminaire Delange-Pisot-Poitou. Théorie des nombres, Volume 19 (1977-1978) no. 2, Talk no. 44, 6 p. 
@article{SDPP_1977-1978__19_2_A18_0,
     author = {Turk, Jan},
     title = {Sets of integers composed of few prime numbers},
     journal = {S\'eminaire Delange-Pisot-Poitou. Th\'eorie des nombres},
     publisher = {Secr\'etariat math\'ematique},
     volume = {19},
     number = {2},
     year = {1977-1978},
     note = {talk:44},
     zbl = {0394.10022},
     language = {en},
     url = {http://www.numdam.org/item/SDPP_1977-1978__19_2_A18_0}
}

Turk, Jan. Sets of integers composed of few prime numbers. Séminaire Delange-Pisot-Poitou. Théorie des nombres, Volume 19 (1977-1978) no. 2, Talk no. 44, 6 p. http://www.numdam.org/item/SDPP_1977-1978__19_2_A18_0/

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