EXPINT - A MATLAB package for exponential integrators. - Håvard Berland; Bård Skaflestad; Will M. Wright (ACM Trans. Math. Softw., 2007)

On the Hopf Algebraic Structure of Lie Group Integrators. - Hans Z. Munthe-Kaas; Will M. Wright (Found. Comput. Math., 2008)

Algorithm 919: A Krylov Subspace Algorithm for Evaluating the ϕ-Functions Appearing in Exponential Integrators. - Jitse Niesen; Will M. Wright (ACM Trans. Math. Softw., 2012)