Zhen He Xiaoyang Sean Wang Byung Suk Lee Alan C. H. Ling Mining partial periodic correlations in time series. 31-54 2008 15 Knowl. Inf. Syst. 1 http://dx.doi.org/10.1007/s10115-006-0051-5 db/journals/kais/kais15.html#HeWLL08