@article{AFST_2014_6_23_5_1103_0,
     author = {Reid, Alan W.},
     title = {Traces, lengths, axes and commensurability},
     journal = {Annales de la Facult\'e des sciences de Toulouse : Math\'ematiques},
     pages = {1103--1118},
     publisher = {Universit\'e Paul Sabatier, Institut de math\'ematiques},
     address = {Toulouse},
     volume = {Ser. 6, 23},
     number = {5},
     year = {2014},
     doi = {10.5802/afst.1438},
     mrnumber = {3294604},
     language = {en},
     url = {http://www.numdam.org/articles/10.5802/afst.1438/}
}