@article{10_1017_S0017089500005024,
     author = {Harman, Glyn},
     title = {Trigonometric sums over primes {II}},
     journal = {Glasgow mathematical journal},
     pages = {23--37},
     year = {1983},
     volume = {24},
     number = {1},
     doi = {10.1017/S0017089500005024},
     url = {http://geodesic.mathdoc.fr/articles/10.1017/S0017089500005024/}
}