K-T.R.A.C.E: A kernel k-means procedure for classification. - Claudio Cifarelli; L. Nieddu; Onur Seref; Panos M. Pardalos (Comput. Oper. Res., 2007)

Statistical Face Recognition via a k-Means Iterative Algorithm. - Claudio Cifarelli; Gaetano Manfredi; L. Nieddu (ICMLA, 2008)