X. He, S. Yan, Y. Hu, P. Niyogi, H. Zhang, "Face recognition using Laplacianfaces", IEEE Transactions on Pattern Analysis and Machine Intelligence, Volume 2, No. 3, pages 328-340, 2005.
W. Yu, X. Teng, C. Liu, "Face recognition using discriminant locality preserving projection", Image and Vision Computing, Volume 24, pages 239-248, 2006.