Hejhal, D. A. (1976). The Selberg Trace formula for PSL, 2,IR. Springer.
Cita Chicago (17th ed.)Hejhal, Dennis A. The Selberg Trace Formula for PSL, 2,IR. Berlín: Springer, 1976.
Cita MLA (9th ed.)Hejhal, Dennis A. The Selberg Trace Formula for PSL, 2,IR. Springer, 1976.
Atenció: Aquestes cites poden no estar 100% correctes.