XXIII: 39, 490-502, LNM 1372 (1989)
KÜCHLER, Uwe; SALMINEN, Paavo
On spectral measures of strings and excursions of quasi-diffusions
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XXV: 31, 354-373, LNM 1485 (1991)
KÜCHLER, Uwe; NEUMANN, Kirsten
An extension of Krein's inverse spectral theorem to strings with nonreflective left boundaries
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