@article{GDZPPN00229298X,
title = {Independence in the Small among Universal Algebras.},
journal = {Mathematische Annalen},
volume = {154},
year = {1964},
pages = {273-284},
url = {http://dml.mathdoc.fr/item/GDZPPN00229298X}
}
O'KEEFE, E.S. Independence in the Small among Universal Algebras.. Mathematische Annalen, Tome 154 (1964) pp. 273-284. http://gdmltest.u-ga.fr/item/GDZPPN00229298X/