中国科学院数学与系统科学研究院期刊网
AMS
Multi-parameter Triebel–Lizorkin and Besov Spaces Associatedwith Flag Singular Integrals
Yong DING, Guo Zhen LU, Bo Lin MA
Acta Mathematica Sinica . 2010, (4): 603 -620 .  DOI: 10.1007/s10114-010-8352-8