@article{1183530661,
author = {Lee, Keean},
title = {A note on functors ${\text{Ext}}$ over the ring $Z$},
journal = {Bull. Amer. Math. Soc.},
volume = {75},
number = {5},
year = {1969},
pages = { 852-856},
language = {en},
url = {http://dml.mathdoc.fr/item/1183530661}
}
Lee, Keean. A note on functors ${\text{Ext}}$ over the ring $Z$. Bull. Amer. Math. Soc., Tome 75 (1969) no. 5, pp. 852-856. http://gdmltest.u-ga.fr/item/1183530661/