@article{bwmeta1.element.desklight-8904c9e4-4508-4214-9813-613fd22c5056,
author = {Krzysztof Pra\.zmowski},
title = {Groups of squares and half-equivalences in geometry},
journal = {Colloquium Mathematicae},
volume = {51},
year = {1987},
pages = {157-168},
zbl = {0654.51018},
language = {en},
url = {http://dml.mathdoc.fr/item/bwmeta1.element.desklight-8904c9e4-4508-4214-9813-613fd22c5056}
}
Krzysztof Prażmowski. Groups of squares and half-equivalences in geometry. Colloquium Mathematicae, Tome 51 (1987) pp. 157-168. http://gdmltest.u-ga.fr/item/bwmeta1.element.desklight-8904c9e4-4508-4214-9813-613fd22c5056/