The Dirac operator on collapsing S 1 -bundles
Séminaire de théorie spectrale et géométrie, Tome 16 (1997-1998), pp. 33-42. 
@article{TSG_1997-1998__16__33_0,
     author = {Ammann, Bernd},
     title = {The {Dirac} operator on collapsing $S^1$-bundles},
     journal = {S\'eminaire de th\'eorie spectrale et g\'eom\'etrie},
     pages = {33--42},
     publisher = {Institut Fourier},
     address = {Grenoble},
     volume = {16},
     year = {1997-1998},
     zbl = {0935.58014},
     language = {en},
     url = {http://www.numdam.org/item/TSG_1997-1998__16__33_0/}
}
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Ammann, Bernd. The Dirac operator on collapsing $S^1$-bundles. Séminaire de théorie spectrale et géométrie, Tome 16 (1997-1998), pp. 33-42. http://www.numdam.org/item/TSG_1997-1998__16__33_0/

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