@article{GDZPPN002235366,
title = {A Relative cohomological invariant for group pairs.},
journal = {Manuscripta mathematica},
volume = {83},
year = {1994},
pages = {1-18},
zbl = {0837.20061},
url = {http://dml.mathdoc.fr/item/GDZPPN002235366}
}
Andrade, M.G.C.; Fanti, E.L.C. A Relative cohomological invariant for group pairs.. Manuscripta mathematica, Tome 83 (1994) pp. 1-18. http://gdmltest.u-ga.fr/item/GDZPPN002235366/