中国科学院数学与系统科学研究院期刊网
ON THE REPRESENTATION OF LARGE EVEN INTEGER AS A SUM OF A PRIME AND A PRODUCT OF AT MOST 4 PRIMES
王元
Acta Mathematica Sinica, Chinese Series . 1956, (4): 565 -582 .  DOI: 10.12386/A1956sxxb0044