no. 1
Appendix : “Picard groups of Zariski surfaces”
Compositio Mathematica, Tome 54 (1985) no. 1, pp. 37-40 
@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},
     year = {1985},
     publisher = {Martinus Nijhoff Publishers},
     volume = {54},
     number = {1},
     mrnumber = {1557073},
     zbl = {0624.14022},
     language = {en},
     url = {https://www.numdam.org/item/CM_1985__54_1_37_0/}
}
TY  - JOUR
AU  - Blass, Piotr
AU  - Lang, Jeffrey
TI  - Appendix : “Picard groups of Zariski surfaces”
JO  - Compositio Mathematica
PY  - 1985
SP  - 37
EP  - 40
VL  - 54
IS  - 1
PB  - Martinus Nijhoff Publishers
UR  - https://www.numdam.org/item/CM_1985__54_1_37_0/
LA  - en
ID  - CM_1985__54_1_37_0
ER  - 
%0 Journal Article
%A Blass, Piotr
%A Lang, Jeffrey
%T Appendix : “Picard groups of Zariski surfaces”
%J Compositio Mathematica
%D 1985
%P 37-40
%V 54
%N 1
%I Martinus Nijhoff Publishers
%U https://www.numdam.org/item/CM_1985__54_1_37_0/
%G en
%F CM_1985__54_1_37_0
Blass, Piotr; Lang, Jeffrey. Appendix : “Picard groups of Zariski surfaces”. Compositio Mathematica, Tome 54 (1985) no. 1, pp. 37-40. https://www.numdam.org/item/CM_1985__54_1_37_0/

[1] P. Blass: Picard groups of Zariski surfaces I. Comp. Math. 54 (1985) 3-36. | Zbl | MR | Numdam

[2] P. Blass: Groupes de Picard des surfaces de Zariski. Comptes Rendus des Seances de I'Academie des Sciences, I-315, 19 septembre 1983. | MR

[3] Jeffrey Lang: The divisor class group of the surface zpn = G(x,y) over fields of characteristic p > 0. Journal of Algebra (2) 1983. | Zbl