@article{1102992300,
author = {Roetman, Ernest L.},
title = {On the biharmonic wave equation.},
journal = {Pacific J. Math.},
volume = {23},
number = {3},
year = {1967},
pages = { 139-158},
language = {en},
url = {http://dml.mathdoc.fr/item/1102992300}
}
Roetman, Ernest L. On the biharmonic wave equation.. Pacific J. Math., Tome 23 (1967) no. 3, pp. 139-158. http://gdmltest.u-ga.fr/item/1102992300/