[1] Y. Lu and Y. Yi, On Cochrane sums over short intervals, J. Math.
Anal. Appl. 356 (2009), 502-516.
[2] G. Pólya, Über die Verteilung der quadratische Reste und
Nichtreste, Göttingen Nachrichten (1918), 21-29.
[3] D. Ren and Y. Yi, On the mean value of general Cochrane sum, Proc.
Japan Acad., Ser. A 86 (2010), 1-5.
[4] I. M. Vinogradov, On the distribution of residues and non-residues
of powers, J. Phys. Math. Soc. Perm 1 (1918), 94-96.
[5] A. Weil, Sur les courbes algébriques et les variétés qui
sén déduisent, Actualités Sci. Ind. 1041 (1948).
[6] W. Zhang and Y. Yi, On the upper bound estimate of Cochrane sums,
Soochow J. Math. 28 (2002), 297-304.
[7] W. Zhang, On a sum analogous to Dedekind sum and its mean square
value formula, Int. J. Math. Math. Sci. 32 (2002), 47-55.
[8] W. Zhang, On a Cochrane sum and its hybrid mean value formula, J.
Math. Anal. Appl. 267 (2002), 89-96.
[9] W. Zhang, On a Cochrane sum and its hybrid mean value formula
(II), J. Math. Anal. Appl. 276 (2002), 446-457.