Astronomical spectrograph calibration with broad-spectrum frequency combsD. A. Braje, M. S. Kirchner, S. Osterman, T. Fortier and S. A. DiddamsEur. Phys. J. D, 48 1 (2008) 57-66DOI: https://doi.org/10.1140/epjd/e2008-00099-9