@article{EXMA_1994__3_2_227738,
     author = {Cougnard, Jean},
     title = {A stably free and non-free ring of integers. {(Un} anneau d'entiers stablement libre et non libre.)},
     journal = {Experimental mathematics},
     pages = {129--136},
     publisher = {mathdoc},
     volume = {3},
     number = {2},
     year = {1994},
     zbl = {0837.11062},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/EXMA_1994__3_2_227738/}
}