@article{1256067582,
author = {Koehler, John E.},
title = {The type set of a torsion-free group of finite rank},
journal = {Illinois J. Math.},
volume = {9},
number = {4},
year = {1965},
pages = { 66-86},
language = {en},
url = {http://dml.mathdoc.fr/item/1256067582}
}
Koehler, John E. The type set of a torsion-free group of finite rank. Illinois J. Math., Tome 9 (1965) no. 4, pp. 66-86. http://gdmltest.u-ga.fr/item/1256067582/