Wang, Duo, and Toshihisa Tanaka. “Kernel Principal Component Analysis Allowing Sparse Representation and Sample Selection”. ECTI Transactions on Computer and Information Technology (ECTI-CIT) 13, no. 1 (June 23, 2019): 9–20. Accessed March 29, 2024. https://ph01.tci-thaijo.org/index.php/ecticit/article/view/187506.