PT Journal AU A. Pujol Jordi Vitria Felipe Lumbreras Juan J. Villanueva TI Topological principal component analysis for face encoding and recognition SO Pattern Recognition Letters JI PRL PY 2001 BP 769–776 VL 22 IS 6-7 DI 10.1016/S0167-8655(01)00027-7 AB IF: 0.552 ER