X. M. Wei & S. P. Tao. (1970). The Boundedness of Littlewood-Paley Operators with Rough Kernels on Weighted $(L^q, L^p)^{\alpha}(\mathbf{R}^n)$ Spaces. Analysis in Theory and Applications. 29 (2). 135-148. doi:10.4208/ata.2013.v29.n2.5