@article{ASENS_2019__52_5_1155_0,
     author = {Sarnak, P. and Zhao, P.},
     title = {The {Quantum} {Variance}  of the {Modular} {Surface}},
     journal = {Annales scientifiques de l'\'Ecole Normale Sup\'erieure},
     pages = {1155--1200},
     publisher = {Soci\'et\'e Math\'ematique de France. Tous droits r\'eserv\'es},
     volume = {Ser. 4, 52},
     number = {5},
     year = {2019},
     doi = {10.24033/asens.2406},
     mrnumber = {4057780},
     zbl = {1455.11076},
     language = {en},
     url = {http://archive.numdam.org/articles/10.24033/asens.2406/}
}