@article{04039410, title = {An inverse problem for biharmonic equation.}, journal = {International Journal of Mathematics and Mathematical Sciences}, volume = {11}, year = {1988}, pages = {413-415}, doi = {10.1155/S0161171288000493}, zbl = {0637.73027}, language = {en}, url = {http://dml.mathdoc.fr/item/04039410} }
Ramm, A.G. An inverse problem for biharmonic equation.. International Journal of Mathematics and Mathematical Sciences, Tome 11 (1988) pp. 413-415. doi : 10.1155/S0161171288000493. http://gdmltest.u-ga.fr/item/04039410/