中国科学院数学与系统科学研究院期刊网
AMS
On Conditionally Positive Definite Dot Product Kernels
V. A. MENEGATTO, C. P. OLIVEIRA, Ana P. PERON
Acta Mathematica Sinica . 2008, (7): 1127 -1138 .  DOI: 10.1007/s10114-007-6227-4