Principal Manifolds for Data Visualization and Dimension Reduction - Gorban, Alexander N.; Barth, Timothy J.; Gorban, A. N.Aleksandr Nikolaevich; Griebel, Michael; Kégl, Balázs; Wunsch, Donald C.; Zinovyev, Andrei Y.; KÃ©gl, BalÃ¡zs; Zinovyev, Andrei (Springer, 2007)