no. 2
Spectral properties of Schrödinger operators and scattering theory
Annali della Scuola Normale Superiore di Pisa - Classe di Scienze, Série 4, Tome 2 (1975) no. 2, pp. 151-218. 
@article{ASNSP_1975_4_2_2_151_0,
     author = {Agmon, Shmuel},
     title = {Spectral properties of Schr\"odinger operators and scattering theory},
     journal = {Annali della Scuola Normale Superiore di Pisa - Classe di Scienze},
     pages = {151--218},
     publisher = {Scuola normale superiore},
     volume = {Ser. 4, 2},
     number = {2},
     year = {1975},
     zbl = {0315.47007},
     mrnumber = {397194},
     language = {en},
     url = {archive.numdam.org/item/ASNSP_1975_4_2_2_151_0/}
}
Agmon, Shmuel. Spectral properties of Schrödinger operators and scattering theory. Annali della Scuola Normale Superiore di Pisa - Classe di Scienze, Série 4, Tome 2 (1975) no. 2, pp. 151-218. http://archive.numdam.org/item/ASNSP_1975_4_2_2_151_0/

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