@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/