Diffusion Limit of the Lorentz Model: Asymptotic Preserving SchemesChristophe Buet, Stéphane Cordier, Brigitte Lucquin-Desreux and Simona ManciniESAIM: M2AN, 36 4 (2002) 631-655DOI: https://doi.org/10.1051/m2an:2002028