@article{SM_2002_193_4_a0,
     author = {I. K. Babenko},
     title = {L\"owner's conjecture, {the~Besicovitch} barrel, and relative systolic geometry},
     journal = {Sbornik. Mathematics},
     pages = {473--486},
     publisher = {mathdoc},
     volume = {193},
     number = {4},
     year = {2002},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_2002_193_4_a0/}
}