@article{10_4064_sm_86_3_287_290,
     author = {Ingemar Wik},
     title = {Note on a theorem by {Reshetnyak-Gurov}},
     journal = {Studia Mathematica},
     pages = {287--290},
     publisher = {mathdoc},
     volume = {86},
     number = {3},
     year = {1987},
     doi = {10.4064/sm-86-3-287-290},
     language = {pl},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/sm-86-3-287-290/}
}