@article{AUCMP_1987_28_2_a3,
     author = {Brothers, John E. and Ziemer, William P.},
     title = {Minimal rearrangements of {Sobolev} functions},
     journal = {Acta Universitatis Carolinae. Mathematica et Physica},
     pages = {13--24},
     year = {1987},
     volume = {28},
     number = {2},
     mrnumber = {0932735},
     zbl = {0659.46029},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/AUCMP_1987_28_2_a3/}
}