[1] Mozzochi, C.J. and Balasubramanian, R. (1978) Some Comments on Goldbach’s Conjecture. Report No. 11, Mittag-Leffler Institute.
[2] Balasubramanian, R. and Mozzochi, C.J. (1983) Siegel Zeros and the Goldbach Problem. Journal of Number Theory, 16, 311-332.
[3] Estermann, T. (1961) Introduction to Modern Prime Number Theory. Cambridge Univ. Press, London/New York.
[4] Montgomery, H.L. and Vaughan, R.C. (1973) Error Terms in Additive Prime Number Theory. Quarterly Journal of Mathematics, 24, 207-216.
[5] Hardy, G.H. and Wright, E.M. (1965) An Introduction to the Theory of Numbers. 4th Edition, Oxford University Press, London/New York.
[6] Carleson, L. (1966-1967) Sur la convergence et l'order des gradeur des somes partielles des series de Fourier. Marseille Notes.
[7] Tao, T. (2012) Heuristic Limitations of the Circle Method. Blog Post 20 May 2012, 1-11.