Geodesic
Construction of cyclic extensions of degree $p^2$ for a complete field
Zapiski Nauchnykh Seminarov POMI, Problems in the theory of representations of algebras and groups. Part 31, Tome 455 (2017), pp. 52-66 
I. Zhukov; E. Lysenko. Construction of cyclic extensions of degree $p^2$ for a complete field. Zapiski Nauchnykh Seminarov POMI, Problems in the theory of representations of algebras and groups. Part 31, Tome 455 (2017), pp. 52-66. http://geodesic.mathdoc.fr/item/ZNSL_2017_455_a5/
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     title = {Construction of cyclic extensions of degree $p^2$ for a~complete field},
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Voir la notice du chapitre de livre provenant de la source Math-Net.Ru

In the present paper we embed a given cyclic extension of degree $p$ of a complete discrete valuation field of characteristic 0 with an arbitrary residue field of characteristic $p>0$ into a cyclic extension of degree $p^2$. The result extends the construction obtained by S. V. Vostokov and I. B. Zhukov in terms of Witt vectors, to a wider interval of values for the ramification jump of the original field extension.

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