@article{10_4064_sm_75_1_1_11,
     author = {Eric Sawyer},
     title = {A characterization of a two-weight norm inequality for maximal operators},
     journal = {Studia Mathematica},
     pages = {1--11},
     publisher = {mathdoc},
     volume = {75},
     number = {1},
     year = {1982},
     doi = {10.4064/sm-75-1-1-11},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/sm-75-1-1-11/}
}