@article{1103036913,
author = {Friedman, Avner},
title = {The wave equation for differential forms.},
journal = {Pacific J. Math.},
volume = {11},
number = {4},
year = {1961},
pages = { 1267-1279},
language = {en},
url = {http://dml.mathdoc.fr/item/1103036913}
}
Friedman, Avner. The wave equation for differential forms.. Pacific J. Math., Tome 11 (1961) no. 4, pp. 1267-1279. http://gdmltest.u-ga.fr/item/1103036913/