K. Chandrasekharan and &. R. Narasimhan, The approximate functional equation for a class of zeta-functions, Mathematische Annalen, vol.9, issue.2, pp.30-64, 1963.
DOI : 10.1007/BF01343729

J. B. Conrey and &. H. Iwaniec, The Cubic Moment of Central Values of Automorphic L-Functions, The Annals of Mathematics, vol.151, issue.3, pp.1175-1216, 2000.
DOI : 10.2307/121132

T. Cochrane and &. Z. Zheng, A survey on pure and mixed exponential sums modulo prime powers, Number theory for the millennium, I, pp.273-300, 2000.

. Dedeo, Generalized Kloosterman sums over rings of order 2 r, Congressus Numerantium, vol.165, pp.65-75, 2003.

D. R. Heath-brown and &. Tsang, Sign Changes of E(T), ??(x), and P(x), Journal of Number Theory, vol.49, issue.1, pp.73-83, 1994.
DOI : 10.1006/jnth.1994.1081

T. A. Hulse, E. M. Kiral, C. I. Kuan, and &. Lim, THE SIGN OF FOURIER COEFFICIENTS OF HALF-INTEGRAL WEIGHT CUSP FORMS, International Journal of Number Theory, vol.08, issue.03, pp.749-762, 2012.
DOI : 10.1142/S179304211250042X

A. Ivi´civi´c, The Riemann zeta-function. Theory and applications, 2003.

H. Iwaniec, Fourier coefficients of modular forms of half-integral weight, Inventiones Mathematicae, vol.30, issue.2, pp.385-401, 1987.
DOI : 10.1007/BF01389423

H. Iwaniec, Topics in classical automorphic forms, Graduate Studies in Mathematics, vol.17, 1997.
DOI : 10.1090/gsm/017

Y. Jiang, G. Lü, Y. Lau, E. Royer, and &. J. Wu, On Fourier coefficients of modular forms of half integral weight at squarefree integers, manuscript

M. Jutila, On exponential sums involving the divisor function, J. Reine Angew. Math, vol.355, pp.173-190, 1985.

Y. Lau and &. J. Wu, The number of Hecke eigenvalues of same signs, Mathematische Zeitschrift, vol.313, issue.1, pp.959-970, 2009.
DOI : 10.1007/s00209-008-0448-9
URL : https://hal.archives-ouvertes.fr/hal-00347529

Y. Lau, E. Royer, and &. J. Wu, SIGN OF FOURIER COEFFICIENTS OF MODULAR FORMS OF HALF-INTEGRAL WEIGHT, Mathematika, vol.56, issue.03
DOI : 10.1090/gsm/017
URL : https://hal.archives-ouvertes.fr/hal-01167163

&. M. Matomäki, Multiplicative functions in short intervals, Annals of Mathematics, vol.183, issue.3
DOI : 10.4007/annals.2016.183.3.6

J. Meher and &. M. Murty, Sign changes of Fourier coefficients of half-integral weight cusp forms, International Journal of Number Theory, vol.10, issue.04, pp.905-914, 2014.
DOI : 10.1142/S1793042114500067

G. Tenenbaum, Introduction to analytic and probabilistic number theory, Translated from the second French edition, Cambridge Studies in Advanced Mathematics, vol.46, 1995.

J. Wu, C. , and I. Cartan-de-lorraine, F-54506 Vandoeuvrel` es, p.54506