1. An introduction to the trace formula;['Arthur, James'];Harmonic analysis, the trace formula, and Shimura varieties,2005
2. Fields of Rationality of Cusp Forms;['Binder, John'];Isr. J. Math.,2017
3. On the Ramanujan conjecture over number fields;['Blomer, Valentin', 'Brumley, Farrell'];Ann. Math.,2011
4. [4] Brumley, Farrell; Milićević, Djordje Counting cusp forms with analytic conductor (2018) (https://arxiv.org/abs/1805.00633)
5. [5] Bump, Daniel Automorphic Forms and Representations, Cambridge Studies in Advanced Mathematics, Cambridge University Press, 1997 no. 55