@article{10_4064_sm_46_3_297_299,
     author = {A. Calder\'on and A. Zygmund},
     title = {Addendum to a paper {"On} singular integrals"},
     journal = {Studia Mathematica},
     pages = {297--299},
     publisher = {mathdoc},
     volume = {46},
     number = {3},
     year = {1973},
     doi = {10.4064/sm-46-3-297-299},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/sm-46-3-297-299/}
}