%0 Journal Article %A Hanusch, Maximilian %T A $\mathcal {C}^k$-seeley-extension-theorem for Bastiani’s differential calculus %J Canadian journal of mathematics %D 2023 %P 170-201 %V 75 %N 1 %U http://geodesic.mathdoc.fr/articles/10.4153/S0008414X21000596/ %R 10.4153/S0008414X21000596 %F 10_4153_S0008414X21000596