@article{1250127503,
author = {Fegen, H.D.},
title = {Differential equations on Lie groups and Tori, the wave equations and Huygens' Principle},
journal = {Rocky Mountain J. Math.},
volume = {14},
number = {4},
year = {1984},
pages = { 699-704},
language = {en},
url = {http://dml.mathdoc.fr/item/1250127503}
}
Fegen, H.D. Differential equations on Lie groups and Tori, the wave equations and Huygens' Principle. Rocky Mountain J. Math., Tome 14 (1984) no. 4, pp. 699-704. http://gdmltest.u-ga.fr/item/1250127503/