@article{GDZPPN002062119,
title = {Projective k-invariants},
journal = {Commentarii mathematici Helvetici},
volume = {51},
year = {1976},
pages = {259-278},
zbl = {0329.55009},
url = {http://dml.mathdoc.fr/item/GDZPPN002062119}
}
Dyer, Michael N. Projective k-invariants. Commentarii mathematici Helvetici, Tome 51 (1976) pp. 259-278. http://gdmltest.u-ga.fr/item/GDZPPN002062119/