@article{10_4171_dm_44,
     author = {Haruzo Hida},
     title = {Global quadratic units and {Hecke} algebras},
     journal = {Documenta mathematica},
     pages = {273--284},
     year = {1998},
     volume = {3},
     doi = {10.4171/dm/44},
     url = {http://geodesic.mathdoc.fr/articles/10.4171/dm/44/}
}