@article{10_4064_fm198_3_6,
     author = {Neil Dobbs and Bart/lomiej Skorulski},
     title = {Non-existence of
  absolutely continuous invariant probabilities for exponential maps},
     journal = {Fundamenta Mathematicae},
     pages = {283--287},
     publisher = {mathdoc},
     volume = {198},
     number = {3},
     year = {2008},
     doi = {10.4064/fm198-3-6},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/fm198-3-6/}
}