@article{etna_vol29_pp1-18, author = {Thomas Schmelzer and Lloyd N. Trefethen}, title = {Evaluating matrix functions for exponential integrators via Carath\'eodory-Fej\'er approximation and contour integrals}, journal = {Electron. Trans. Numer. Anal.}, volume = {29}, year = {2007-2008}, pages = {1--18}, }