@article{GDZPPN002215306,
title = {Morphismen von Funktoren.},
journal = {Manuscripta mathematica},
volume = {1},
year = {1969},
pages = {87-98},
zbl = {0164.01302},
url = {http://dml.mathdoc.fr/item/GDZPPN002215306}
}
Pumplün, Dieter; Röhrl, Helmut. Morphismen von Funktoren.. Manuscripta mathematica, Tome 1 (1969) pp. 87-98. http://gdmltest.u-ga.fr/item/GDZPPN002215306/