@article{CM_1985__54_1_37_0, author = {Blass, Piotr and Lang, Jeffrey}, title = {Appendix : {{\textquotedblleft}Picard} groups of {Zariski} surfaces{\textquotedblright}}, journal = {Compositio Mathematica}, pages = {37--40}, publisher = {Martinus Nijhoff Publishers}, volume = {54}, number = {1}, year = {1985}, zbl = {0624.14022}, mrnumber = {782383}, language = {en}, url = {http://www.numdam.org/item/CM_1985__54_1_37_0/} }