@article{GDZPPN002069466,
title = {Counterexamples to the Kneser conjecture in dimension four.},
journal = {Commentarii mathematici Helvetici},
volume = {70},
year = {1995},
pages = {423-433},
zbl = {0837.57016},
url = {http://dml.mathdoc.fr/item/GDZPPN002069466}
}
Kreck, M.; Lück, W.; Teichner, P. Counterexamples to the Kneser conjecture in dimension four.. Commentarii mathematici Helvetici, Tome 70 (1995) pp. 423-433. http://gdmltest.u-ga.fr/item/GDZPPN002069466/