no. 3
The non-archimedean space 𝒞 ∞ (X)
Compositio Mathematica, Tome 48 (1983) no. 3, pp. 297-309. 
@article{CM_1983__48_3_297_0,
     author = {De Grande-De Kimpe, Nicole},
     title = {The non-archimedean space $\mathcal {C}^\infty (X)$},
     journal = {Compositio Mathematica},
     pages = {297--309},
     publisher = {Martinus Nijhoff Publishers},
     volume = {48},
     number = {3},
     year = {1983},
     zbl = {0509.46063},
     language = {en},
     url = {www.numdam.org/item/CM_1983__48_3_297_0/}
}
de Grande-de Kimpe, N. The non-archimedean space $\mathcal {C}^\infty (X)$. Compositio Mathematica, Tome 48 (1983) no. 3, pp. 297-309. http://www.numdam.org/item/CM_1983__48_3_297_0/

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