@article{1029004602,
author = {Smillie, John and Vogtmann, Karen},
title = {Length functions and outer space.},
journal = {Michigan Math. J.},
volume = {39},
number = {1},
year = {1992},
pages = { 485-493},
language = {en},
url = {http://dml.mathdoc.fr/item/1029004602}
}
Smillie, John; Vogtmann, Karen. Length functions and outer space.. Michigan Math. J., Tome 39 (1992) no. 1, pp. 485-493. http://gdmltest.u-ga.fr/item/1029004602/