@article{JRAM_1977__290_151838,
     author = {R.C. Vaughan},
     title = {On the estimation of {Schnirelman's} constant.},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {93--108},
     publisher = {mathdoc},
     volume = {290},
     year = {1977},
     zbl = {0344.10028},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1977__290_151838/}
}