@article{GDZPPN002063840,
title = {The first k-invariant, Quillen's space BG+ and the construction of Kann and Thurston.},
journal = {Commentarii mathematici Helvetici},
volume = {55},
year = {1980},
pages = {314-318},
zbl = {0443.18017},
url = {http://dml.mathdoc.fr/item/GDZPPN002063840}
}
Huebschmann, Johannes. The first k-invariant, Quillen's space BG+ and the construction of Kann and Thurston.. Commentarii mathematici Helvetici, Tome 55 (1980) pp. 314-318. http://gdmltest.u-ga.fr/item/GDZPPN002063840/