@incollection{JEDP_1991____A15_0,
     author = {Laptev, Ari and Safarov, Yu},
     title = {Error estimate in the generalized {Szeg\"o} theorem},
     booktitle = {},
     series = {Journ\'ees \'equations aux d\'eriv\'ees partielles},
     eid = {15},
     pages = {1--7},
     year = {1991},
     publisher = {Ecole polytechnique},
     doi = {10.5802/jedp.417},
     mrnumber = {92j:35141},
     zbl = {0743.58032},
     language = {en},
     url = {https://www.numdam.org/articles/10.5802/jedp.417/}
}