Estermann, T. (1938). "On Goldbach's problem: proof that almost all even positive integers are sums of two primes". Proc. London Math. Soc. 2. 44: 307–314. doi:10.1112/plms/s2-44.4.307.
Van der Corput, J. G. (1938). "Sur l'hypothèse de Goldbach"(PDF). Proc. Akad. Wet. Amsterdam (in French). 41: 76–80.
maa.org
eulerarchive.maa.org
"Letter XLIII, Goldbach to Euler". Correspondence of Leonhard Euler. Mathematical Association of America. 7 June 1742. Retrieved 2025-01-19.
In the printed version published by P. H. Fuss [1] 2 is misprinted as 1 in the marginal conjecture.
"Letter XLIV, Euler to Goldbach"(PDF). Correspondence of Leonhard Euler. Mathematical Association of America. 30 June 1742. Retrieved 2025-01-19.
mathnet.ru
mi.mathnet.ru
Schnirelmann, L. G. (1930). "On the additive properties of numbers", first published in "Proceedings of the Don Polytechnic Institute in Novocherkassk" (in Russian), vol 14 (1930), pp. 3–27, and reprinted in "Uspekhi Matematicheskikh Nauk" (in Russian), 1939, no. 6, 9–25.