@article{10_4007_annals_2016_184_3_8,
     author = {W. Duke and \"O. Imamoḡlu and \'A. T\'oth},
     title = {Geometric invariants for real quadratic fields},
     journal = {Annals of mathematics},
     pages = {949--990},
     publisher = {mathdoc},
     volume = {184},
     number = {3},
     year = {2016},
     doi = {10.4007/annals.2016.184.3.8},
     mrnumber = {3549627},
     zbl = {06647936},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4007/annals.2016.184.3.8/}
}