00999nam0-22003131i-450-99000654566040332120001010000654566FED01000654566(Aleph)000654566FED0100065456620001010d--------km-y0itay50------baitay-------001yyGeometry of reflecting rays and inverse spectral problemsVesselin M. Petkov and Luchezar N. StoyanovChichesterJ. Wiley and Sons1992.VI, 313 p.23 cmInterscience series of texts, monographs, and tractsPure and applied mathematicsa WileyPetkov,Vesselin M.246010Stoyanov,Luchezar N.ITUNINARICAUNIMARCBK990006545660403321VI E 44717061FSPBCFSPBCGeometry of reflecting rays and inverse spectral problems619358UNINAGEN01