@article{urn:eudml:doc:43451,
title = {Homotetias entre duas circunferencias.},
journal = {Gaceta Matem\'atica},
volume = {24},
year = {1972},
pages = {14-16},
language = {pt},
url = {http://dml.mathdoc.fr/item/urn:eudml:doc:43451}
}
Machado Cardoso, Jayme. Homotetias entre duas circunferencias.. Gaceta Matemática, Tome 24 (1972) pp. 14-16. http://gdmltest.u-ga.fr/item/urn:eudml:doc:43451/