@article{JRAM_1977__289_151829,
     author = {Ming-Chit Liu},
     title = {Diophantine approximation involving primes.},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {199--208},
     publisher = {mathdoc},
     volume = {289},
     year = {1977},
     zbl = {0336.10029},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1977__289_151829/}
}