@article{GDZPPN002357763,
title = {A natural map from the ext K\"unneth sequence to the Tor one.},
journal = {Mathematica Scandinavica},
volume = {53},
year = {1983},
pages = {203-206},
zbl = {0547.18005},
url = {http://dml.mathdoc.fr/item/GDZPPN002357763}
}
Weibull, Thomas. A natural map from the ext Künneth sequence to the Tor one.. Mathematica Scandinavica, Tome 53 (1983) pp. 203-206. http://gdmltest.u-ga.fr/item/GDZPPN002357763/