@article{AFST_2014_6_23_5_967_0,
     author = {Parkkonen, Jouni and Paulin, Fr\'ed\'eric},
     title = {On the arithmetic of cross-ratios and generalised {Mertens{\textquoteright}} formulas},
     journal = {Annales de la Facult\'e des sciences de Toulouse : Math\'ematiques},
     pages = {967--1022},
     publisher = {Universit\'e Paul Sabatier, Institut de math\'ematiques},
     address = {Toulouse},
     volume = {Ser. 6, 23},
     number = {5},
     year = {2014},
     doi = {10.5802/afst.1433},
     mrnumber = {3294599},
     language = {en},
     url = {http://www.numdam.org/articles/10.5802/afst.1433/}
}