@article{bwmeta1.element.bwnjournal-article-fmv50i2p207bwm,
author = {B. Eckman and Peter Hilton},
title = {Structure maps in group theory},
journal = {Fundamenta Mathematicae},
volume = {49},
year = {1961},
pages = {207-221},
zbl = {0104.01703},
language = {en},
url = {http://dml.mathdoc.fr/item/bwmeta1.element.bwnjournal-article-fmv50i2p207bwm}
}
Eckman, B.; Hilton, Peter. Structure maps in group theory. Fundamenta Mathematicae, Tome 49 (1961) pp. 207-221. http://gdmltest.u-ga.fr/item/bwmeta1.element.bwnjournal-article-fmv50i2p207bwm/