@article{2326,
author = {Miles, E.P. jr.},
title = {The analytic Cauchy problem for the iterated wave equation},
journal = {Portugaliae mathematica},
volume = {18},
year = {1959},
pages = {111-119},
zbl = {0100.08901},
mrnumber = {0113041},
language = {en},
url = {http://dml.mathdoc.fr/item/2326}
}
Miles, E.P. jr. The analytic Cauchy problem for the iterated wave equation. Portugaliae mathematica, Tome 18 (1959) pp. 111-119. http://gdmltest.u-ga.fr/item/2326/