@article{SPS_1991__25__354_0,
     author = {K\"uchler, Uwe and Neumann, Kirsten},
     title = {An extension of {Krein's} inverse spectral theorem to strings with nonreflecting left boundaries},
     journal = {S\'eminaire de probabilit\'es de Strasbourg},
     pages = {354--373},
     publisher = {Springer - Lecture Notes in Mathematics},
     volume = {25},
     year = {1991},
     mrnumber = {1187794},
     zbl = {0744.60086},
     language = {en},
     url = {http://www.numdam.org/item/SPS_1991__25__354_0/}
}