@article{10_4064_sm_65_1_77_87,
     author = {A. Calder\'on and A. Zygmund},
     title = {A note on singular integrals},
     journal = {Studia Mathematica},
     pages = {77--87},
     year = {1979},
     volume = {65},
     number = {1},
     doi = {10.4064/sm-65-1-77-87},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/sm-65-1-77-87/}
}