no. 3
Generalization of p-adic cohomology ; bounded Witt vectors. A canonical lifting of a variety in characteristic p≠0 back to characteristic zero
Compositio Mathematica, Tome 34 (1977) no. 3, pp. 225-277. 
@article{CM_1977__34_3_225_0,
     author = {Lubkin, Saul},
     title = {Generalization of $p$-adic cohomology ; bounded {Witt} vectors. {A} canonical lifting of a variety in characteristic $p \ne 0$ back to characteristic zero},
     journal = {Compositio Mathematica},
     pages = {225--277},
     publisher = {Noordhoff International Publishing},
     volume = {34},
     number = {3},
     year = {1977},
     mrnumber = {453745},
     zbl = {0368.14009},
     language = {en},
     url = {http://archive.numdam.org/item/CM_1977__34_3_225_0/}
}
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Lubkin, Saul. Generalization of $p$-adic cohomology ; bounded Witt vectors. A canonical lifting of a variety in characteristic $p \ne 0$ back to characteristic zero. Compositio Mathematica, Tome 34 (1977) no. 3, pp. 225-277. http://archive.numdam.org/item/CM_1977__34_3_225_0/

[1] Saul Lubkin: A p-Adic Proof of Weil's Conjectures. Annals of Mathematics, 87, Nos. 1-2, Jan-March, 1968, 105-255. | MR | Zbl

[2] Saul Lubkin: Generalization of p-adic Cohomology (to appear).

[3] Ernst Witt: Zyklische Körper und Algebren der Charackteristik p von Grade pn. J. Reine angew. Math., 176 (1936) 126-140. | Zbl