@article{SEDP_2008-2009____A15_0,
     author = {Tzvetkov, Nikolay},
     title = {Riemannian analogue of a {Paley-Zygmund} theorem},
     journal = {S\'eminaire \'Equations aux d\'eriv\'ees partielles (Polytechnique) dit aussi "S\'eminaire Goulaouic-Schwartz"},
     note = {talk:15},
     pages = {1--14},
     publisher = {Centre de math\'ematiques Laurent Schwartz, \'Ecole polytechnique},
     year = {2008-2009},
     language = {en},
     url = {http://archive.numdam.org/item/SEDP_2008-2009____A15_0/}
}