↑ Chen, J.R. (1966). “On the representation of a large even integer as the sum of a prime and the product of at most two primes”. Kexue Tongbao. 17: 385–386.
1 2 Chen, J.R. (1973). “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.
↑ Ross, P.M. (1975). “On Chen's theorem that each large even number has the form (p1+p2) or (p1+p2p3)”. J. London Math. Soc. (2). 10, 4: 50–06. doi:10.1112/jlms/s2-10.4.500.
