Eigenvalues of the Laplacian for Hecke triangle groups /
Hejhal, Dennis A.
Providence, R.I. : American Mathematical Society,
c1992.
"May 1992, Volume 97, Number 469 (end of volume)."
Includes bibliographical references.
Selberg trace formula.
Automorphic functions.
Eigenvalues.
Laplacian operator.