Berard, P. H., & Besson, G. (1986). Spectral geometry: Direct and inverse problems. Rio de Janeiro: Instituto de Matemβatica Pura e Aplicada.
Παραπομπή Chicago StyleBerard, Pierre H., and G. Besson. Spectral Geometry: Direct and Inverse Problems. Rio de Janeiro: Instituto de Matemβatica Pura e Aplicada, 1986.
Παραπομπή MLABerard, Pierre H., and G. Besson. Spectral Geometry: Direct and Inverse Problems. Rio de Janeiro: Instituto de Matemβatica Pura e Aplicada, 1986.
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