1. Alon, N.: Combinatorial Nullstellensatz. Combin. Probab. Comput. 8, 7–29 (1999)
2. Boscole, J.: Sequence A126972 in OEIS (2007). Website: http://oeis.org/A126972
3. Bradley, P.: Prime number sums. Preprint arXiv:1809.01012 (2018)
4. Chen, J.-R.: On the representation of a larger even integer as the sum of a prime and the product of at most two primes. Sci. Sinica 16, 157–176 (1973)
5. Cloitre, B.: Sequences A073112 and A073364 in OEIS (2002). http://oeis.org