@article{CRMATH_2010__348_17-18_977_0,
     author = {Enrico Laeng},
     title = {A simple real-variable proof that the {Hilbert} transform is an $ {L}^{2}$-isometry},
     journal = {Comptes Rendus. Math\'ematique},
     pages = {977--980},
     publisher = {Elsevier},
     volume = {348},
     number = {17-18},
     year = {2010},
     doi = {10.1016/j.crma.2010.07.002},
     language = {en},
}