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[1] Eigenvalues of the Laplacian for Hecke Triangle Groups - Dennis A. Hejhal - AMS, 1992, 165 pp., Softcover, ISBN-10: 0-8218-2529-1, ISBN-13: 978-0-8218-2529-7, List: US$34, Institutional Member: US$27.20, Individual Member: US$20.40, MEMO/97/469 |
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[2] Regular \(b\)-Groups, Degenerating Riemann Surfaces, and Spectral Theory - Dennis A. Hejhal - AMS, 1990, 138 pp., Softcover, ISBN-10: 0-8218-2499-6, ISBN-13: 978-0-8218-2499-3, List: US$25, Institutional Member: US$20, Individual Member: US$15, MEMO/88/437 |
