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@article{CM_1985__54_1_3_0, author = {Blass, Piotr}, title = {Picard groups of {Zariski} surfaces}, journal = {Compositio Mathematica}, pages = {3--36}, publisher = {Martinus Nijhoff Publishers}, volume = {54}, number = {1}, year = {1985}, mrnumber = {782383}, zbl = {0624.14021}, language = {en}, url = {http://geodesic.mathdoc.fr/item/CM_1985__54_1_3_0/} }
Blass, Piotr. Picard groups of Zariski surfaces. Compositio Mathematica, Tome 54 (1985) no. 1, pp. 3-36. http://geodesic.mathdoc.fr/item/CM_1985__54_1_3_0/