@article{10_4171_dm_43,
     author = {Heinrich von Weizs\"acker and Michael Scheutzow},
     title = {Which moments of a logarithmic derivative imply quasiinvariance},
     journal = {Documenta mathematica},
     pages = {261--272},
     year = {1998},
     volume = {3},
     doi = {10.4171/dm/43},
     url = {http://geodesic.mathdoc.fr/articles/10.4171/dm/43/}
}