@article{GDZPPN002063662,
title = {Smooth solutions of the heat and wave equations.},
journal = {Commentarii mathematici Helvetici},
volume = {55},
year = {1980},
pages = {1-12},
zbl = {0439.35017},
url = {http://dml.mathdoc.fr/item/GDZPPN002063662}
}
Smale, Stephen. Smooth solutions of the heat and wave equations.. Commentarii mathematici Helvetici, Tome 55 (1980) pp. 1-12. http://gdmltest.u-ga.fr/item/GDZPPN002063662/