@article{01893535, title = {Lifting M\"obius groups: Addendum.}, journal = {The New York Journal of Mathematics [electronic only]}, volume = {8}, year = {2002}, pages = {257-258}, zbl = {1066.30039}, language = {en}, url = {http://dml.mathdoc.fr/item/01893535} }
Button, J. O. Lifting Möbius groups: Addendum.. The New York Journal of Mathematics [electronic only], Tome 8 (2002) pp. 257-258. http://gdmltest.u-ga.fr/item/01893535/