@incollection{JEDP_1989____A17_0, author = {Hiroshi Isozaki}, title = {Some remarks on the multi-dimensional {Borg-Levinson} theorem}, booktitle = {}, series = {Journ\'ees \'equations aux d\'eriv\'ees partielles}, eid = {17}, pages = {1--6}, publisher = {\'Ecole polytechnique}, year = {1989}, zbl = {0708.35094}, mrnumber = {91m:35240}, language = {en}, url = {https://proceedings.centre-mersenne.org/item/JEDP_1989____A17_0/} }
Hiroshi Isozaki. Some remarks on the multi-dimensional Borg-Levinson theorem. Journées équations aux dérivées partielles (1989), article no. 17, 6 p. https://proceedings.centre-mersenne.org/item/JEDP_1989____A17_0/