@article{CRMATH_2008__346_23-24_1239_0,
     author = {Ivarsson, Bj\"orn and Kutzschebauch, Frank},
     title = {A solution of {Gromov's} {Vaserstein} problem},
     journal = {Comptes Rendus. Math\'ematique},
     pages = {1239--1243},
     publisher = {Elsevier},
     volume = {346},
     number = {23-24},
     year = {2008},
     doi = {10.1016/j.crma.2008.10.017},
     language = {en},
     url = {http://www.numdam.org/articles/10.1016/j.crma.2008.10.017/}
}