@article{10_4064_sm206_2_1,
     author = {Ron Kerman and Lubo\v{s} Pick},
     title = {Explicit formulas for optimal rearrangement-invariant norms in {Sobolev} imbedding inequalities},
     journal = {Studia Mathematica},
     pages = {97--119},
     publisher = {mathdoc},
     volume = {206},
     number = {2},
     year = {2011},
     doi = {10.4064/sm206-2-1},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/sm206-2-1/}
}