@article{GDZPPN00236235X,
title = {A Theorem of Grothendieck Using Picard Groups for the Algebraist.},
journal = {Mathematica Scandinavica},
volume = {74},
year = {1994},
pages = {161-183},
zbl = {0827.13006},
url = {http://dml.mathdoc.fr/item/GDZPPN00236235X}
}
Call, Frederick W. A Theorem of Grothendieck Using Picard Groups for the Algebraist.. Mathematica Scandinavica, Tome 74 (1994) pp. 161-183. http://gdmltest.u-ga.fr/item/GDZPPN00236235X/