@article{10_4171_dm_164,
     author = {R. Preeti and J.-P. Tignol},
     title = {Multipliers of improper similitudes},
     journal = {Documenta mathematica},
     pages = {183--204},
     year = {2004},
     volume = {9},
     doi = {10.4171/dm/164},
     url = {http://geodesic.mathdoc.fr/articles/10.4171/dm/164/}
}