@article{01204392,
title = {Purity and direct summands.},
journal = {Divulgaciones Matem\'aticas},
volume = {4},
year = {1996},
pages = {49-53},
zbl = {0909.16002},
language = {en},
url = {http://dml.mathdoc.fr/item/01204392}
}
Oneto R., Ángel V. Purity and direct summands.. Divulgaciones Matemáticas, Tome 4 (1996) pp. 49-53. http://gdmltest.u-ga.fr/item/01204392/