@article{10_4064_sm_56_1_1_20,
     author = {David Shreve},
     title = {Approximation of commutators of singular integrals},
     journal = {Studia Mathematica},
     pages = {1--20},
     year = {1976},
     volume = {56},
     number = {1},
     doi = {10.4064/sm-56-1-1-20},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/sm-56-1-1-20/}
}