@article{00780175,
title = {A stably free and non-free ring of integers. (Un anneau d'entiers stablement libre et non libre.)},
journal = {Experimental Mathematics},
volume = {3},
year = {1994},
pages = {129-136},
doi = {10.1080/10586458.1994.10504284},
zbl = {0837.11062},
language = {en},
url = {http://dml.mathdoc.fr/item/00780175}
}
Cougnard, Jean. A stably free and non-free ring of integers. (Un anneau d'entiers stablement libre et non libre.). Experimental Mathematics, Tome 3 (1994) pp. 129-136. doi : 10.1080/10586458.1994.10504284. http://gdmltest.u-ga.fr/item/00780175/