کتاب های Dennis A. Hejhal
The Selberg Trace Formula for PSL(2,R) (volume 2)
Dennis A. Hejhal, 1983
The Selberg Trace Formula for PSL(2R)
Dennis A. Hejhal, 1983
The Selberg Trace Formula for PSL(2R) Volume I
Dennis A. Hejhal, 1976
Eigenvalues of the Laplacian for Hecke Triangle Groups
Dennis A. Hejhal, 1992
