Variational problems for riemannian functionals and arithmetic groups
Publications Mathématiques de l'IHÉS, Tome 92 (2000), pp. 5-62. 
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     pages = {5--62},
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     volume = {92},
     year = {2000},
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     zbl = {1003.58007},
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     url = {http://archive.numdam.org/item/PMIHES_2000__92__5_0/}
}
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Nabutovsky, Alexander; Weinberger, Shmuel. Variational problems for riemannian functionals and arithmetic groups. Publications Mathématiques de l'IHÉS, Tome 92 (2000), pp. 5-62. http://archive.numdam.org/item/PMIHES_2000__92__5_0/

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