@article{GDZPPN002217333,
title = {Exakte Paare und Kettenkomplexe.},
journal = {Manuscripta mathematica},
volume = {11},
year = {1973},
pages = {357-374},
zbl = {0258.18002},
url = {http://dml.mathdoc.fr/item/GDZPPN002217333}
}
Mertens, Jens-Uwe. Exakte Paare und Kettenkomplexe.. Manuscripta mathematica, Tome 11 (1973) pp. 357-374. http://gdmltest.u-ga.fr/item/GDZPPN002217333/