@article{GDZPPN002177013,
title = {Hasse factor systems reduced mod ... .},
journal = {Journal f\"ur die reine und angewandte Mathematik},
volume = {193},
year = {1954},
pages = {161-165},
zbl = {0058.02902},
url = {http://dml.mathdoc.fr/item/GDZPPN002177013}
}
Masuda, K. Hasse factor systems reduced mod ... .. Journal für die reine und angewandte Mathematik, Tome 193 (1954) pp. 161-165. http://gdmltest.u-ga.fr/item/GDZPPN002177013/