Barkley, Kevrekidis, and Stuart. 2006. “The Moment Map: Nonlinear Dynamics of Density Evolution via a Few Moments”. Siam Journal on Applied Dynamical Systems 5 (3): 403-34. Reference Link
Coifman, Kevrekidis, Lafon, Maggioni, and Nadler. 2008. “DIFFUSION MAPS, REDUCTION COORDINATES, AND LOW DIMENSIONAL REPRESENTATION OF STOCHASTIC SYSTEMS”. Multiscale Modeling & Simulation 7 (2): 842-64. Reference Link