@article{GDZPPN002405555,
title = {Non-nilpotent Elements of Cohomology Rings.},
journal = {Mathematische Zeitschrift},
volume = {111},
year = {1969},
pages = {364-374},
zbl = {0179.32105},
url = {http://dml.mathdoc.fr/item/GDZPPN002405555}
}
Johnson, David L. Non-nilpotent Elements of Cohomology Rings.. Mathematische Zeitschrift, Tome 111 (1969) pp. 364-374. http://gdmltest.u-ga.fr/item/GDZPPN002405555/