@article{01423420, title = {A new approach to inverse spectral theory. I: Fundamental formalism.}, journal = {Annals of Mathematics. Second Series}, volume = {150}, year = {1999}, pages = {1029-1057}, doi = {10.2307/121061}, zbl = {0945.34013}, language = {en}, url = {http://dml.mathdoc.fr/item/01423420} }
Simon, Barry. A new approach to inverse spectral theory. I: Fundamental formalism.. Annals of Mathematics. Second Series, Tome 150 (1999) pp. 1029-1057. doi : 10.2307/121061. http://gdmltest.u-ga.fr/item/01423420/