@article{MZ_1966__91_170502,
     author = {M.M. Robertson},
     title = {Integrability theorems for trigonometric series and transforms.},
     journal = {Mathematische Zeitschrift},
     pages = {20--29},
     publisher = {mathdoc},
     volume = {91},
     year = {1966},
     zbl = {0147.05601},
     url = {http://geodesic.mathdoc.fr/item/MZ_1966__91_170502/}
}