Graph-Based Multilevel Dimensionality Reduction with Applications to Eigenfaces and Latent Semantic Indexing. - Sophia Sakellaridi; Haw-ren Fang; Yousef Saad (ICMLA, 2008)

Multilevel manifold learning with application to spectral clustering. - Haw-ren Fang; Sophia Sakellaridi; Yousef Saad (CIKM, 2010)