@article{10_4171_dm_418,
     author = {Alexandru Buium},
     title = {P-jets of finite algebras. {II:} $p$-typical {Witt} rings},
     journal = {Documenta mathematica},
     pages = {971--996},
     year = {2013},
     volume = {18},
     doi = {10.4171/dm/418},
     url = {http://geodesic.mathdoc.fr/articles/10.4171/dm/418/}
}