@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}, zbl = {0624.14021}, mrnumber = {782383}, language = {en}, url = {http://www.numdam.org/item/CM_1985__54_1_3_0/} }