1. J. Arthur, The invariant trace formula. II. Global theory, J. Amer. Math. Soc., 1 (1988), 501–554.
2. J. Arthur, The L 2-Lefschetz numbers of Hecke operators, Invent. Math., 97 (1989), 257–290.
3. J. Arthur, A stable trace formula. I. General expansions, J. Inst. Math. Jussieu, 1 (2002), 175–277.
4. J. Arthur, An introduction to the trace formula, In: Harmonic Analysis, the Trace Formula, and Shimura Varieties, (eds. J. Arthur, D. Ellwood and R. Kottwitz), Clay Math. Proc., 4, Amer. Math. Soc., Providence, RI, 2005, pp. 1–263.
5. J. Arthur, Lectures at Banff International Research Station, August 2008, videos accessible at http://www.birs.ca/publications/workshop_videos/2008.htm .