@article{MS2_1994__74_1_167288,
     author = {Frederick W. Call},
     title = {A {Theorem} of {Grothendieck} {Using} {Picard} {Groups} for the {Algebraist.}},
     journal = {Mathematica Scandinavica},
     pages = {161--183},
     publisher = {mathdoc},
     volume = {74},
     number = {1},
     year = {1994},
     zbl = {0827.13006},
     url = {http://geodesic.mathdoc.fr/item/MS2_1994__74_1_167288/}
}