@article{10_4153_S0008414X21000596,
     author = {Hanusch, Maximilian},
     title = {A $\mathcal {C}^k$-seeley-extension-theorem for {Bastiani{\textquoteright}s} differential calculus},
     journal = {Canadian journal of mathematics},
     pages = {170--201},
     year = {2023},
     volume = {75},
     number = {1},
     doi = {10.4153/S0008414X21000596},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/S0008414X21000596/}
}