@article{MS2_1978__42_166587,
     author = {Sven Toft Jensen},
     title = {Picard schemes of quotients by finite commutative group schemes.},
     journal = {Mathematica Scandinavica},
     pages = {197--210},
     publisher = {mathdoc},
     volume = {42},
     year = {1978},
     zbl = {0406.14027},
     url = {http://geodesic.mathdoc.fr/item/MS2_1978__42_166587/}
}