An extension of Whitney's spectral theorem
Publications Mathématiques de l'IHÉS, Volume 40 (1971), p. 139-148 
@article{PMIHES_1971__40__139_0,
     author = {Tougeron, Jean-Claude},
     title = {An extension of Whitney's spectral theorem},
     journal = {Publications Math\'ematiques de l'IH\'ES},
     publisher = {Institut des Hautes \'Etudes Scientifiques},
     volume = {40},
     year = {1971},
     pages = {139-148},
     zbl = {0239.46023},
     mrnumber = {51 \#6872},
     language = {en},
     url = {http://www.numdam.org/item/PMIHES_1971__40__139_0}
}

Tougeron, Jean-Claude. An extension of Whitney's spectral theorem. Publications Mathématiques de l'IHÉS, Volume 40 (1971) pp. 139-148. http://www.numdam.org/item/PMIHES_1971__40__139_0/

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