中国科学院数学与系统科学研究院期刊网
Refined Functional Equations Stemming from Cubic,Quadratic and Additive Mappings
Ick-Soon CHANG, Eunyoung SON, Hark-Mahn KIM
Acta Mathematica Sinica . 2009, (10): 1595 -1608 .  DOI: 10.1007/s10114-009-7190-z