@article{10_4064_sm_101_2_155_163,
     author = {B. Bojarski},
     title = {The {Muckenhoupt} class {A₁(R)}},
     journal = {Studia Mathematica},
     pages = {155--163},
     publisher = {mathdoc},
     volume = {101},
     number = {2},
     year = {1991},
     doi = {10.4064/sm-101-2-155-163},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/sm-101-2-155-163/}
}