中国科学院数学与系统科学研究院期刊网
The Integer Parts of a Nonlinear Form with Integer Variables and Powers 2, 3 and 4
Wei Ping LI, Bai Yun SU, Tian Ze WANG
Acta Mathematica Sinica, Chinese Series . 2014, (2): 273 -280 .  DOI: 10.12386/A2014sxxb0027