Ng , Yu-Keung and Leung , Shingyu. (2019). Estimating the Finite Time Lyapunov Exponent from Sparse Lagrangian Trajectories.
            <i>Communications in Computational Physics</i>. <i>26</i> (4).
            1143-1177.
         doi:10.4208/cicp.OA-2018-0149