中国科学院数学与系统科学研究院期刊网
AMS
Hua’s Theorem with s Almost Equal Prime Variables
Qing Feng SUN, Heng Cai TANG
Acta Mathematica Sinica . 2009, (7): 1145 -1156 .  DOI: 10.1007/s10114-009-7251-3