An elementary treatment of a general diophantine problem
Annali della Scuola Normale Superiore di Pisa - Classe di Scienze, Serie 4, Volume 15 (1988) no. 4, p. 603-614 
@article{ASNSP_1988_4_15_4_603_0,
     author = {Watt, Nigel},
     title = {An elementary treatment of a general diophantine problem},
     journal = {Annali della Scuola Normale Superiore di Pisa - Classe di Scienze},
     publisher = {Scuola normale superiore},
     volume = {Ser. 4, 15},
     number = {4},
     year = {1988},
     pages = {603-614},
     zbl = {0689.10045},
     mrnumber = {1029857},
     language = {en},
     url = {http://www.numdam.org/item/ASNSP_1988_4_15_4_603_0}
}

Watt, Nigel. An elementary treatment of a general diophantine problem. Annali della Scuola Normale Superiore di Pisa - Classe di Scienze, Serie 4, Volume 15 (1988) no. 4, pp. 603-614. http://www.numdam.org/item/ASNSP_1988_4_15_4_603_0/

[1] E. Bombieri - H. Iwaniec, On the order of ΞΆ (1/2 +it), Ann. Scuola Norm. Sup. Pisa Cl. Sci. (4) 13 (1986) 449-472. | Numdam | Zbl 0615.10047

[2] E. Bombieri - H. Iwaniec, Some mean-value theorems for exponential sums, Ann. Scuola Norm. Sup. Pisa Cl. Sci. (4) 13 (1986) 473-486. | Numdam | MR 881102 | Zbl 0615.10046

[3] M.N. Huxley - N. Watt, Exponential sums and the Riemann zeta-function, Proc. London Math. Soc. (3) 57 (1988) 1-24. | MR 940429 | Zbl 0644.10027

[4] N. Watt, Exponential sums and the Riemann zeta-function II, J. London Math. Soc., to appear. | MR 1002452 | Zbl 0678.10027

[5] N. Watt, A problem on semicubical powers, Acta Arith., to appear. | MR 1005599 | Zbl 0619.10033