@article{GDZPPN002061309,
title = {Almost Canonical Inverse Images},
journal = {Commentarii mathematici Helvetici},
volume = {49},
year = {1974},
pages = {168-174},
zbl = {0318.57014},
url = {http://dml.mathdoc.fr/item/GDZPPN002061309}
}
Quinn, Frank. Almost Canonical Inverse Images. Commentarii mathematici Helvetici, Tome 49 (1974) pp. 168-174. http://gdmltest.u-ga.fr/item/GDZPPN002061309/